BACKGROUND A solitary fibrous tumor(SFT)is often located in the pleura,while SFT of the pancreas is extremely rare.Here,we report a case of SFT of the pancreas and discuss imaging,histopathology,and immunohistochemist...BACKGROUND A solitary fibrous tumor(SFT)is often located in the pleura,while SFT of the pancreas is extremely rare.Here,we report a case of SFT of the pancreas and discuss imaging,histopathology,and immunohistochemistry for accurate diagnosis and treatment.CASE SUMMARY A 54-year-old man presented to our hospital with pancreatic occupancy for over a month.There were no previous complaints of discomfort.His blood pressure was normal.Blood glucose,tumor markers,and enhanced computed tomography(CT)suggested a malignant tumor.Because the CT appearance of pancreatic cancer varies,we could not confirm the diagnosis;therefore,we performed endoscopic ultrasound-guided fine-needle biopsy(EUS-FNB).Pathology and immunohistochemistry were consistent with SFT of the pancreas.The posto-perative pathology and immunohistochemistry were consistent with the puncture results.The patient presented for a follow-up examination one month after discharge with no adverse effects.CONCLUSION Other diseases must be excluded in patients with a pancreatic mass that cannot be diagnosed.CT and pathological histology have diagnostic value for pancreatic tumors.Endoscopic puncture biopsy under ultrasound can help diagnose pancreatic masses that cannot be diagnosed preoperatively.Surgery is an effective treatment for SFT of the pancreas;however,long-term follow-up is strongly recommended because of the possibility of malignant transformation of the tumor.展开更多
Depleting fossil energy sources and conventional polluting power generation pose a threat to sustainable development.Hydroelectricity generation from ubiquitous and spontaneous phase transitions between liquid and gas...Depleting fossil energy sources and conventional polluting power generation pose a threat to sustainable development.Hydroelectricity generation from ubiquitous and spontaneous phase transitions between liquid and gaseous water has been considered a promising strategy for mitigating the energy crisis.Fibrous materials with unique flexibility,processability,multifunctionality,and practicability have been widely applied for fibrous materials-based hydroelectricity generation(FHG).In this review,the power generation mechanisms,design principles,and electricity enhancement factors of FHG are first introduced.Then,the fabrication strategies and characteristics of varied constructions including 1D fiber,1D yarn,2D fabric,2D membrane,3D fibrous framework,and 3D fibrous gel are demonstrated.Afterward,the advanced functions of FHG during water harvesting,proton dissociation,ion separation,and charge accumulation processes are analyzed in detail.Moreover,the potential applications including power supply,energy storage,electrical sensor,and information expression are also discussed.Finally,some existing challenges are considered and prospects for future development are sincerely proposed.展开更多
BACKGROUND Solitary fibrous tumors(SFT)are rare spindle cell tumors that are usually benign.A total of 10 cases of SFTs in the upper esophagus have ever been reported.Here,we report the anesthetic management of a pati...BACKGROUND Solitary fibrous tumors(SFT)are rare spindle cell tumors that are usually benign.A total of 10 cases of SFTs in the upper esophagus have ever been reported.Here,we report the anesthetic management of a patient with a large isolated fibrous tumor of the upper esophagus compressing the tracheal membrane.We also provide a literature review of the current research.CASE SUMMARY We report the case of a 49 year old male with“cough aggravation and wheezing after exercise”,who underwent esophagectomy for a large isolated fibrous tumor compressing the tracheal membrane in the upper esophagus.We advise the use of a single-lumen tube with a blocker in patients with difficult airways to reduce the incidence of airway injury and fibrinoscopy at all stages of the perioperative period to guide airway management.This case study is the first report of the anesthetic management of a large,isolated fibrous tumor compressing the tracheal membrane in the upper esophagus.CONCLUSION This rare case emphasizes the importance of perioperative management of anesthesia in patients with large isolated fibrous tumors of the upper esophagus that compress the tracheal membrane.The use of blocker reduce the incidence of airway injury and fibrinoscopy at the perioperative period to guide airway mana-gement.展开更多
BACKGROUND Solitary fibrous tumor(SFT)is a remarkably uncommon mesenchymal tumor.STAT6 level and a combination of clinical,pathological,and molecular features are required to arrive at a proper diagnosis.CASE SUMMARY ...BACKGROUND Solitary fibrous tumor(SFT)is a remarkably uncommon mesenchymal tumor.STAT6 level and a combination of clinical,pathological,and molecular features are required to arrive at a proper diagnosis.CASE SUMMARY In this report,we present an intriguing case involving a 43-year-old woman who initially exhibited symptoms of a bleeding retroperitoneal tumor,initially resembling a gastrointestinal stromal tumor,but later confirmed as an SFT.However,a year later,what was initially believed to be a recurrence of her SFT was instead identified as a desmoid tumor.CONCLUSION Distinguishing SFT from other tumors was pivotal.Correcting misdiagnoses of tumor type initially and of recurrence later was necessary for appropriate treatment of the correct desmoid type.展开更多
Background: Dermatofibroma usually occurs on the extremities or trunk as a common and benign skin tumor. The identification of typical dermatofibroma is uncomplicated, although it can be challenge due to its wide rang...Background: Dermatofibroma usually occurs on the extremities or trunk as a common and benign skin tumor. The identification of typical dermatofibroma is uncomplicated, although it can be challenge due to its wide range of presentations and histological variations. Objective: This study was undertaken to evaluate the clinical and histopathological characteristics of 147 Cases of Dermatofibroma. Methods: This is a retrospective study of 147 biopsy specimens of 124 patients who were diagnosed with dermatofibroma in the Department of Dermatology and the Department of Pathology at the Seventh Affiliated Hospital of Sun Yat-sen University between January 2009 and April 2024. All case were retrieved from the saved medical records. Results: Ages of the 124 Dermatofibroma-affected individuals ranged from 11 to 61 years with a male-to-female ratio of 1:1.7. Over 80% of the case occurred between the ages of 20 and 49 years, 61.9% of the lesions were found on the extremities. The duration of the cases varied from 17 days to 30 years and half of lesions (58.2%) persisted for less than two years. Over 60% of the lesions were found on the extremities. The diameter of the tumors ranged between 0.3 cm and 5 cm, with most tumors measuring less than or equal to 2 cm (85.00%). Cutaneous masses or dermatofibroma was the most common clinical diagnosis. Most tumors (79.6%) were asymptomatic. Cutaneous masses or dermatofibroma was the most common clinical diagnosis. Prior to the surgical procedure, 57 cases were suspected to be “DF”, 55 cases were suspected to be “cutaneous masses”. Immunohistochemical staining revealed positive expression of SMA, while the negative rate of CD34 was found to be 66.67%. No diffuse CD34 positivity was observed in all tumors. Conclusion: Variations in clinical features, pathological manifestations, and immunohistochemical results of DF pose challenges for accurate diagnosis. A comprehensive understanding of its clinical and pathological characteristics is crucial for precise identification. Incorporating immunohistochemical analysis can help prevent misdiagnosis.展开更多
[Objectives]To study and optimize the process conditions of enzymatic hydrolysis technology for extracting polysaccharides from Pseudostellaria heterophylla fibrous roots and its application in workshop pilot tests.[M...[Objectives]To study and optimize the process conditions of enzymatic hydrolysis technology for extracting polysaccharides from Pseudostellaria heterophylla fibrous roots and its application in workshop pilot tests.[Methods]P.heterophylla fibrous roots were taken as the matrix material,and Box Behnken design was used to analyze the extraction time,composite enzyme addition amount,and liquid-solid ratio for response surface optimization experiments,and then applied to the pilot extraction of P.heterophylla fibrous roots.[Results]Response surface analysis showed that all factors had a significant impact on the experimental indicators.The optimal extraction process conditions for polysaccharides from P.heterophylla fibrous roots were extraction time of 2.7 h,compound enzyme addition of 2.5%,and liquid-solid ratio of 32.The yield of polysaccharides from P.heterophylla fibrous roots was 4.83%.The water extraction process of P.heterophylla fibrous roots extraction pilot was used as the control group for response surface optimization of the pilot experiment.The optimization results showed that the extraction time was 3 h,the amount of composite enzyme added was 2.5%,and the liquid-solid ratio was 28.The polysaccharide yield was 4.75%,an increase of 4.63%compared to the control group.[Conclusions]This paper could provide feasibility for the innovation of enzy-matic hydrolysis technology for P.heterophylla fibrous roots and its workshop pilot practice application,as well as a reference for the industrial application of its medicinal resources.展开更多
BACKGROUND Calcifying fibrous tumors(CFTs)are rare mesenchymal lesions that can occur in various sites throughout the body,including the tubular gastrointestinal(GI)tract.AIM To analyze the clinical findings of 36 pat...BACKGROUND Calcifying fibrous tumors(CFTs)are rare mesenchymal lesions that can occur in various sites throughout the body,including the tubular gastrointestinal(GI)tract.AIM To analyze the clinical findings of 36 patients with GI tract CFTs to provide guidance for diagnosis and treatment.METHODS This retrospective study included 36 patients diagnosed with CFTs of the GI tract.We collected demographic and clinical information and conducted regular follow-ups to assess for local recurrence.RESULTS The stomach was the most commonly involved site,accounting for 72.2%of the 36 CFTs.Endoscopic mucosal resection(n=1,2.8%),endoscopic submucosal dissection(n=14,38.9%),endoscopic full-thickness resection(n=16,44.4%),and submucosal tunneling endoscopic resection(n=5,13.9%)were used to resect calcifying fibrous tumors.Overall,34(94.4%)CFTs underwent complete endoscopic resections with a mean procedure time of 39.8±29.8 min.The average maximum diameter of the tumors was 10.6±4.3 cm.No complications,such as bleeding or perforation,occurred during an average hospital stay of 2.9±1.2 d.In addition,two patients developed new growth of CFTs near the primary tumor sites,and none of the patients developed distant metastases during the follow-up period.CONCLUSION GI tract CFTs are rare and typically benign tumors that can be effectively managed with endoscopic procedures.展开更多
This study focused on the development and characterization of TiO<sub>2</sub>-PES composite fibers with varying TiO<sub>2</sub> loading amounts using a phase inversion process. The resulting co...This study focused on the development and characterization of TiO<sub>2</sub>-PES composite fibers with varying TiO<sub>2</sub> loading amounts using a phase inversion process. The resulting composite fibers exhibited a sponge-like structure with embedded TiO<sub>2</sub> nanoparticles within a polymer matrix. Their photocatalytic performance for ammonia removal from aqueous solutions under UV-A light exposure was thoroughly investigated. The findings revealed that PeTi8 composite fibers displayed superior adsorption capacity compared to other samples. Moreover, the study explored the impact of pH, light intensity, and catalyst dosage on the photocatalytic degradation of ammonia. Adsorption equilibrium isotherms closely followed the Langmuir model, with the results indicating a correlation between qm values of 2.49 mg/g and the porous structure of the adsorbents. The research underscored the efficacy of TiO<sub>2</sub> composite fibers in the photocatalytic removal of aqueous under UV-A light. Notably, increasing the distance between the photocatalyst and the light source resulted in de-creased hydroxyl radical concentration, influencing photocatalytic efficiency. These findings contribute to our understanding of TiO<sub>2</sub> composite fibers as promising photocatalysts for ammonia removal in water treatment applications.展开更多
The seawater desalination based on solardriven interfacial evaporation has emerged as a promising technique to alleviate the global crisis on freshwater shortage.However,achieving high desalination performance on actu...The seawater desalination based on solardriven interfacial evaporation has emerged as a promising technique to alleviate the global crisis on freshwater shortage.However,achieving high desalination performance on actual,oil-contaminated seawater remains a critical challenge,because the transport channels and evaporation interfaces of the current solar evaporators are easily blocked by the oil slicks,resulting in undermined evaporation rate and conversion efficiency.Herein,we propose a facile strategy for fabricating a modularized solar evaporator based on flexible MXene aerogels with arbitrarily tunable,highly ordered cellular/lamellar pore structures for high-efficiency oil interception and desalination.The core design is the creation of 1D fibrous MXenes with sufficiently large aspect ratios,whose superior flexibility and plentiful link forms lay the basis for controllable 3D assembly into more complicated pore structures.The cellular pore structure is responsible for effective contaminants rejection due to the multi-sieving effect achieved by the omnipresent,isotropic wall apertures together with underwater superhydrophobicity,while the lamellar pore structure is favorable for rapid evaporation due to the presence of continuous,large-area evaporation channels.The modularized solar evaporator delivers the best evaporation rate(1.48 kg m-2h-1)and conversion efficiency(92.08%)among all MXene-based desalination materials on oil-contaminated seawater.展开更多
BACKGROUND Solitary fibrous tumor(SFT)is a rare mesenchymal tumor that is most commonly found in the pleura but can also originate from non-pleural sites.Among the nonpleural localizations,the pancreas is extremely ra...BACKGROUND Solitary fibrous tumor(SFT)is a rare mesenchymal tumor that is most commonly found in the pleura but can also originate from non-pleural sites.Among the nonpleural localizations,the pancreas is extremely rare.In particular,metastasis to the pancreas from the central nervous system(CNS)is extremely rare,with only two cases reported so far.We report a case of recurrence in the pancreas 14 years after the initial complete surgical removal of a tumor in the CNS.CASE SUMMARY A 68-year-old man with a past medical history of recurrent meningeal hemangiopericytoma,currently referred to as SFT,presented to the hospital with jaundice.The patient was first diagnosed with an 8cm-sized meningeal hemangiopericytoma fourteen years ago and underwent osteoplastic craniotomy.After 16 mo,imaging showed recurrence and he underwent gamma knife radiosurgery(GKRS).2 years later,imaging showed recurrence again leading to a second GKRS.5 years later,recurrence was again suspected leading to a second craniotomy.Since then 3 years had passed,and imaging showed a 3.5cm-sized mass lesion on the pancreatic head with obstruction of the pancreatic and bile ducts.Endosonography with fine-needle aspiration biopsy was done preoperatively and aided in the diagnosis of SFT.The patient underwent pyloruspreserving pancreaticoduodenectomy.Pathologic findings of the resected pancreatic specimen,consistent with the previously resected brain specimen,confirmed the diagnosis of SFT.CONCLUSION The rarity and lack of knowledge about SFTs make suspecting and diagnosing this disease challenging.We believe that a report of metastatic pancreatic SFT from the CNS will contribute to a better understanding of this rare disease.展开更多
To explore the genesis of the laminated calcite veins developed in the black shale of Chang 73 submember of the Ordos Basin,the petrology,microstructure and geochemistry of calcite veins are studied using thin section...To explore the genesis of the laminated calcite veins developed in the black shale of Chang 73 submember of the Ordos Basin,the petrology,microstructure and geochemistry of calcite veins are studied using thin sections,fluid inclusions,trace elements and isotopic geochemistry.The source,the time of formation,the mechanism of formation,and the dynamic background of the veins are discussed.The veins are mostly made up of calcite,mixed with lenticular or spindle-shape solid wall rock inclusions.Three structures are identified in the calcite minerals:fibrous,rhombic cleavage,and wedge-like structure.Trace elements and isotopes of carbon and oxygen confirm that the calcite veins were formed from a high density hydrothermal fluid.It is assumed that calcite veins formed prior to wall rock consolidation during the formation of the Qinling Orogenic Belt in the Middle and Late Triassic.The results show that the sedimentary sources of Chang 73 submember were influenced by hydrothermal materials besides terrigenous detritus.The fibrous calcite is different from the fibrous calcite reported in the morphology and mechanism of formation.In this way,the research complements and improves the morphology and the mechanism of formation of fibrous calcite.展开更多
BACKGROUND Fibrous dysplasia associated with aneurysmal bone cyst(ABC)-like changes in the right proximal femur has a low incidence.It is considered more difficult to make early diagnosis than for single fibrous dyspl...BACKGROUND Fibrous dysplasia associated with aneurysmal bone cyst(ABC)-like changes in the right proximal femur has a low incidence.It is considered more difficult to make early diagnosis than for single fibrous dysplasia.CASE SUMMARY A 14-year-old woman was admitted because of persistent pain in the right hip and abnormal gait over the previous 2 mo.She had no history of present or past illness.Preoperative photography,enhanced computed tomography,and magnetic resonance imaging showed ground-glass appearance with cortical scalloping and expansion of the right proximal femur and femoral neck.Pathological examination by preoperative puncture biopsy revealed fibrous dysplasia of the right proximal femur.The patient was diagnosed with fibrous dysplasia based on medical history,physical examination,and results of laboratory,imaging and pathological examinations.According to final pathological examination,the patient was diagnosed with fibrous dysplasia of the right proximal femur associated with ABC.Curettage and allograft along with fixation of compression screws was performed for fibrous dysplasia associated with ABClike changes.No obvious allograft absorption,loosening of fixation,or secondary fracture were observed during 6-months’follow-up with re-examination by plain radiography and computed tomography.Fibrous dysplasia associated with ABClike changes in the right proximal femur has a low incidence and early diagnosis is considered more difficult than for single fibrous dysplasia.CONCLUSION We report a cases of fibrous dysplasia associated with ABC-like changes in the right proximal femur treated with curettage and allograft along with hip compression screws.展开更多
BACKGROUND Angiomatoid fibrous histiocytoma(AFH)is a rare,slow-growing soft tissue tumor.It appears mostly on the limbs and trunk in children and young adults.The biology of AFH remains unclear because of the small nu...BACKGROUND Angiomatoid fibrous histiocytoma(AFH)is a rare,slow-growing soft tissue tumor.It appears mostly on the limbs and trunk in children and young adults.The biology of AFH remains unclear because of the small number of reported cases.Diagnostic testing does not provide definitive results.It has two clinical forms,that differ in terms of gene expression and clinical prognosis.It is important to inform the laboratory which specific gene testing is necessary.Here,we describe a case of rare AFH in the submandibular region using a full genetic panel.CASE SUMMARY A 13-year-old boy who had been misdiagnosed in the past 6 mo by his dentist visited our clinic because of a lesion in the submandibular area on the right side.The lesion was homogeneous and painless upon palpation.No skin discoloration was observed.Due to the non-specific radiological picture computed tomography(CT),magnetic resonance imaging(MRI),cone-beam CT(CBCT),and ultrasoundguided biopsy were performed.A venous malformation was suspected on the MRI.None of the tests provided a definitive diagnosis.Owing to the non-specific radiological findings,the patient qualified for surgical treatment.The surgical procedure included an excisional biopsy.The diagnostic testing was extended using gene rearrangements.The most distinctive gene translocation in diagnosing AFH is within the EWS RNA-binding protein 1(EWSR1)-CREB-binding protein.However,in this case,the diagnosis was confirmed by a rearrangement within the EWSR1 gene testing.CONCLUSION AFH in the submandibular location is rare,and surgical treatment with genetic evaluation defines AFH type that affects subsequent procedures.展开更多
BACKGROUND Fibrous dysplasia is a congenital disorder in which normal bone is replaced by fibro-osseous tissue or irregular trabeculae of woven bone intermixed with mature collagenous tissue.A single or multiple bones...BACKGROUND Fibrous dysplasia is a congenital disorder in which normal bone is replaced by fibro-osseous tissue or irregular trabeculae of woven bone intermixed with mature collagenous tissue.A single or multiple bones are affected.This rare bone disorder has three clinical patterns including monostotic,polyostotic,and that associated with McCune-Albright syndrome.Most studies report primary fibrous dysplasia.However,a few cases of recurrent monostotic fibular fibrous dysplasia have been reported.Here,we report a therapeutic strategy for recurrent fibular fibrous dysplasia.CASE SUMMARY A 4-year-old boy was admitted for persistent pain in the left lower limb and abnormal gait over the previous 9 mo.He had no history of present or past illness.Preoperative imaging data showed erosion-like changes with bone expansion of the left middle and lower fibular segment.Tumor tissue in the fibular bone marrow cavity was removed by curettage,and rapid intraoperative pathological examination suggested fibular fibrous dysplasia.An allograft was implanted into the fibular medullary cavity.However,he was readmitted with clinical symptoms including persistent pain,abnormal gait,and local swelling at the age of 6 years.He was diagnosed with recurrent fibular fibrous dysplasia based on the second medical examination.He underwent fibular bone tumor radical resection and longus fibular allograft transplantation combined with fibular bone locking plate and screws.Good host bone to allogenic bone graft fusion was observed by the physician on postoperative regular follow-up.CONCLUSION Radical resection of fibrous dysplasia and longus fibula allograft combined with internal fixation for reconstruction are suitable for the treatment of recurrent monostotic fibular fibrous dysplasia.展开更多
A procedure of low temperature solid-phase sintering（LTSS） was carried out to fabricate sintered metal fibrous media（SMFM） with high specific surface area.Stainless steel fibers which were produced by cutting proc...A procedure of low temperature solid-phase sintering（LTSS） was carried out to fabricate sintered metal fibrous media（SMFM） with high specific surface area.Stainless steel fibers which were produced by cutting process were first plated with a coarse copper coating layer by electroless plating process.A low-temperature sintering process was then completed at about 800 °C for 1 h under the protection of hydrogen atmosphere.The results show that a novel SMFM with complex surface morphology and high specific surface area（0.2 m2/g） can be obtained in this way.The effect of sintering temperature on the surface morphology and specific surface area of SMFM was studied by means of scanning electron microscopy and Brunauer-Emmett-Teller.The damage of micro-structure during the sintering process mainly contributed to the loss of specific surface area of SMFM and the optimal sintering temperature was 800 °C.展开更多
A novel precursor of nickel-cobalt alloy powders with an appropriate Ni to Co molar ratio was prepared under selectively synthetic conditions. The composition and morphology of the precursor were characterized by X-ra...A novel precursor of nickel-cobalt alloy powders with an appropriate Ni to Co molar ratio was prepared under selectively synthetic conditions. The composition and morphology of the precursor were characterized by X-ray diffractometry （XRD）, scanning electron microscopy （SEM）, Fourier transform infrared spectrometry （FT-IR） and energy dispersive spectrometry （EDS）. The effects of pH value, reaction temperature, metal ion concentrations and surfactant on the morphology and the dispersion of precursor were investigated. The results show that the morphology of precursor depends on ammonia content in the precursor. A fibriform precursor is a complicated ammonia-containing nickel-cobalt oxalate. The uniform shape-controlled fibrous precursor is obtained under the following optimum conditions： ammonia as complex agent as well as pH adjustor, oxalate as coprecipitator, 50-65 °C of reaction temperature, 0.5-0.8 mol/L of total concentration of Ni2＋ and Co2＋, PVP as dispersant, and pH 8.0-8.4.展开更多
Fibrous particulate precursor was obtained by precipitation transformation in the ternary solution system of ammonium oxalate, nickel chloride and ammonia. The composition and morphology of precursor were characterize...Fibrous particulate precursor was obtained by precipitation transformation in the ternary solution system of ammonium oxalate, nickel chloride and ammonia. The composition and morphology of precursor were characterized by XRD, SEM, IR and DTA/TGA analyses. The results show that the chemical composition and morphology of precursor precipitates at pH=8.4？8.8 are different from those of precursor precipitates at pH=6.0, and the mechanisms of the thermal decomposition of the precursors are different. The effects of various conditions in the process of thermal decomposition, including precursor morphology, atmosphere, temperature and time on the morphology and dispersion degree of obtained nickel powders were studied in detail. The final product inherits the morphology of precursor when the thermal decomposition is conducted under a weakly reducing atmosphere at temperature range of 400？440 °C for 30 min. Fibrous nickel powder can be produced with good dispersion, and its shape changes from smooth, straight and compact fiber into loose and curved fiber with rough surface.展开更多
Calcifying fibrous tumor(CFT)is a rare mesenchymal lesion that has been documented throughout the gastrointestinal tract.Gastrointestinal CFTs may occur at virtually any age,with a predilection for adults and for fema...Calcifying fibrous tumor(CFT)is a rare mesenchymal lesion that has been documented throughout the gastrointestinal tract.Gastrointestinal CFTs may occur at virtually any age,with a predilection for adults and for females.They occur most commonly in the stomach and the small and large intestines.CFTs are most often found incidentally,cured by local resection,and have a low risk of recurrence.Histology shows three characteristic features:Spindle cell proliferations within a densely hyalinized stroma,scattered calcifications,and lymphoplasmacytic inflammation.CFTs are immunoreactive for CD34,vimentin and factor XIIIa,helping to distinguish them from other benign mesenchymal neoplasms.The differential diagnosis of CFTs includes sclerosing gastrointestinal stromal tumor,leiomyoma,schwannoma,solitary fibrous tumor,inflammatory myofibroblastic tumor,plexiform fibromyxoma,fibromatosis,sclerosing mesenteritis,and reactive nodular fibrous pseudotumor.The pathogenesis of CFTs remains unclear,but some have hypothesized that they may be linked to IgG4-related disease,inflammatory myofibroblastic lesions,hyaline vascular type Castleman disease,sclerosing angiomatoid nodular transformation of the spleen,or trauma.展开更多
BACKGROUND Solitary fibrous tumor of the liver (SFTL) is a rare occurrence with a low number of cases reported in literature. SFTL is usually benign but, 10%-20% cases are reported to be malignant with a tendency to m...BACKGROUND Solitary fibrous tumor of the liver (SFTL) is a rare occurrence with a low number of cases reported in literature. SFTL is usually benign but, 10%-20% cases are reported to be malignant with a tendency to metastasize. The majority of malignant SFTL cases are associated with a paraneoplastic hypoglycaemia defined as Doege-Potter syndrome. Surgery is the best therapeutic treatment, however, long- life follow-up is recommended. CASE SUMMARY A 74-year-old man, was admitted to the emergency department after a syncopal episode with detection of hypoglycaemia resistant to medical treatment. The computed tomography revealed a solid mass measuring 15 cm of the left liver. An open left hepatectomy was performed with complete resection of tumor. Histopathological analyses confirmed a malignant SFTL. CONCLUSION Large series with long-term follow-up have not been published neither have clinical trials been undertaken. Consequently, the methodical long-term followup of surgically treated SFTLs is strongly recommended.展开更多
BACKGROUND Solitary fibrous tumor(SFT)is a rare fibroblastic mesenchymal neoplasm that affects spindle cell soft tissues with broad-spectrum biological behavior;it is predominantly benign,and rarely metastasizes.SFT o...BACKGROUND Solitary fibrous tumor(SFT)is a rare fibroblastic mesenchymal neoplasm that affects spindle cell soft tissues with broad-spectrum biological behavior;it is predominantly benign,and rarely metastasizes.SFT occurs mainly in the tissue structure of the serosa in the pleura and the thorax,and can be found throughout the body,though extra-thoracic localization,including the cephalic region,is uncommon.We reported the first case of intracranial malignant SFT metastasized to the chest wall.CASE SUMMARY An 81-year-old Japanese man was referred to our hospital due to progressive gait disturbance and appetite loss.His medical history included partial resection due to brain tumor,four times,and 50-Gray radiation therapy at another hospital,starting when he was 74 years old.An unenhanced head computed tomography(CT)scan revealed an 8 cm×5.1 cm×6.5 cm mixed-density mass at the left frontal lobe,accompanying a midline shift,and an unenhanced chest-abdomen CT scan revealed a 6 cm×4.1 cm×6.5 cm low-density mass in the left chest wall.A CT-guided percutaneous lung biopsy was performed,and the pathological findings were SFT corresponding to brain tumor.Finally,the correct diagnosis of his brain tumor in history of past illness revealed to be SFT,and the unremovable tumor,namely present brain lesions enlarged and metastasized to the chest wall.We established a definitive diagnosis of intracranial malignant SFT metastasized to the chest wall.We notified him and his family of the disease,and offered palliative care.He passed away on the 29 th hospital day.CONCLUSION This case suggests the need for careful,detailed examination,and careful followup when encountering patients presenting with a mass.展开更多
文摘BACKGROUND A solitary fibrous tumor(SFT)is often located in the pleura,while SFT of the pancreas is extremely rare.Here,we report a case of SFT of the pancreas and discuss imaging,histopathology,and immunohistochemistry for accurate diagnosis and treatment.CASE SUMMARY A 54-year-old man presented to our hospital with pancreatic occupancy for over a month.There were no previous complaints of discomfort.His blood pressure was normal.Blood glucose,tumor markers,and enhanced computed tomography(CT)suggested a malignant tumor.Because the CT appearance of pancreatic cancer varies,we could not confirm the diagnosis;therefore,we performed endoscopic ultrasound-guided fine-needle biopsy(EUS-FNB).Pathology and immunohistochemistry were consistent with SFT of the pancreas.The posto-perative pathology and immunohistochemistry were consistent with the puncture results.The patient presented for a follow-up examination one month after discharge with no adverse effects.CONCLUSION Other diseases must be excluded in patients with a pancreatic mass that cannot be diagnosed.CT and pathological histology have diagnostic value for pancreatic tumors.Endoscopic puncture biopsy under ultrasound can help diagnose pancreatic masses that cannot be diagnosed preoperatively.Surgery is an effective treatment for SFT of the pancreas;however,long-term follow-up is strongly recommended because of the possibility of malignant transformation of the tumor.
基金funding support from the National Key Research and Development Program of China(No.2022YFB3805800)the National Natural Science Foundation of China(52173059)+1 种基金The Major Basic Research Project of the Natural Science Foundation of the Jiangsu Higher Education Institutions(21KJA540002)Jiangsu Funding Program for Excellent Postdoctoral Talent(2022ZB555).
文摘Depleting fossil energy sources and conventional polluting power generation pose a threat to sustainable development.Hydroelectricity generation from ubiquitous and spontaneous phase transitions between liquid and gaseous water has been considered a promising strategy for mitigating the energy crisis.Fibrous materials with unique flexibility,processability,multifunctionality,and practicability have been widely applied for fibrous materials-based hydroelectricity generation(FHG).In this review,the power generation mechanisms,design principles,and electricity enhancement factors of FHG are first introduced.Then,the fabrication strategies and characteristics of varied constructions including 1D fiber,1D yarn,2D fabric,2D membrane,3D fibrous framework,and 3D fibrous gel are demonstrated.Afterward,the advanced functions of FHG during water harvesting,proton dissociation,ion separation,and charge accumulation processes are analyzed in detail.Moreover,the potential applications including power supply,energy storage,electrical sensor,and information expression are also discussed.Finally,some existing challenges are considered and prospects for future development are sincerely proposed.
文摘BACKGROUND Solitary fibrous tumors(SFT)are rare spindle cell tumors that are usually benign.A total of 10 cases of SFTs in the upper esophagus have ever been reported.Here,we report the anesthetic management of a patient with a large isolated fibrous tumor of the upper esophagus compressing the tracheal membrane.We also provide a literature review of the current research.CASE SUMMARY We report the case of a 49 year old male with“cough aggravation and wheezing after exercise”,who underwent esophagectomy for a large isolated fibrous tumor compressing the tracheal membrane in the upper esophagus.We advise the use of a single-lumen tube with a blocker in patients with difficult airways to reduce the incidence of airway injury and fibrinoscopy at all stages of the perioperative period to guide airway management.This case study is the first report of the anesthetic management of a large,isolated fibrous tumor compressing the tracheal membrane in the upper esophagus.CONCLUSION This rare case emphasizes the importance of perioperative management of anesthesia in patients with large isolated fibrous tumors of the upper esophagus that compress the tracheal membrane.The use of blocker reduce the incidence of airway injury and fibrinoscopy at the perioperative period to guide airway mana-gement.
文摘BACKGROUND Solitary fibrous tumor(SFT)is a remarkably uncommon mesenchymal tumor.STAT6 level and a combination of clinical,pathological,and molecular features are required to arrive at a proper diagnosis.CASE SUMMARY In this report,we present an intriguing case involving a 43-year-old woman who initially exhibited symptoms of a bleeding retroperitoneal tumor,initially resembling a gastrointestinal stromal tumor,but later confirmed as an SFT.However,a year later,what was initially believed to be a recurrence of her SFT was instead identified as a desmoid tumor.CONCLUSION Distinguishing SFT from other tumors was pivotal.Correcting misdiagnoses of tumor type initially and of recurrence later was necessary for appropriate treatment of the correct desmoid type.
文摘Background: Dermatofibroma usually occurs on the extremities or trunk as a common and benign skin tumor. The identification of typical dermatofibroma is uncomplicated, although it can be challenge due to its wide range of presentations and histological variations. Objective: This study was undertaken to evaluate the clinical and histopathological characteristics of 147 Cases of Dermatofibroma. Methods: This is a retrospective study of 147 biopsy specimens of 124 patients who were diagnosed with dermatofibroma in the Department of Dermatology and the Department of Pathology at the Seventh Affiliated Hospital of Sun Yat-sen University between January 2009 and April 2024. All case were retrieved from the saved medical records. Results: Ages of the 124 Dermatofibroma-affected individuals ranged from 11 to 61 years with a male-to-female ratio of 1:1.7. Over 80% of the case occurred between the ages of 20 and 49 years, 61.9% of the lesions were found on the extremities. The duration of the cases varied from 17 days to 30 years and half of lesions (58.2%) persisted for less than two years. Over 60% of the lesions were found on the extremities. The diameter of the tumors ranged between 0.3 cm and 5 cm, with most tumors measuring less than or equal to 2 cm (85.00%). Cutaneous masses or dermatofibroma was the most common clinical diagnosis. Most tumors (79.6%) were asymptomatic. Cutaneous masses or dermatofibroma was the most common clinical diagnosis. Prior to the surgical procedure, 57 cases were suspected to be “DF”, 55 cases were suspected to be “cutaneous masses”. Immunohistochemical staining revealed positive expression of SMA, while the negative rate of CD34 was found to be 66.67%. No diffuse CD34 positivity was observed in all tumors. Conclusion: Variations in clinical features, pathological manifestations, and immunohistochemical results of DF pose challenges for accurate diagnosis. A comprehensive understanding of its clinical and pathological characteristics is crucial for precise identification. Incorporating immunohistochemical analysis can help prevent misdiagnosis.
基金Supported by Special Project of Central Leading Local Science and Technology Development(202113030)Regional Development Project of Fujian Provincial Science and Technology Plan(2022N3017).
文摘[Objectives]To study and optimize the process conditions of enzymatic hydrolysis technology for extracting polysaccharides from Pseudostellaria heterophylla fibrous roots and its application in workshop pilot tests.[Methods]P.heterophylla fibrous roots were taken as the matrix material,and Box Behnken design was used to analyze the extraction time,composite enzyme addition amount,and liquid-solid ratio for response surface optimization experiments,and then applied to the pilot extraction of P.heterophylla fibrous roots.[Results]Response surface analysis showed that all factors had a significant impact on the experimental indicators.The optimal extraction process conditions for polysaccharides from P.heterophylla fibrous roots were extraction time of 2.7 h,compound enzyme addition of 2.5%,and liquid-solid ratio of 32.The yield of polysaccharides from P.heterophylla fibrous roots was 4.83%.The water extraction process of P.heterophylla fibrous roots extraction pilot was used as the control group for response surface optimization of the pilot experiment.The optimization results showed that the extraction time was 3 h,the amount of composite enzyme added was 2.5%,and the liquid-solid ratio was 28.The polysaccharide yield was 4.75%,an increase of 4.63%compared to the control group.[Conclusions]This paper could provide feasibility for the innovation of enzy-matic hydrolysis technology for P.heterophylla fibrous roots and its workshop pilot practice application,as well as a reference for the industrial application of its medicinal resources.
基金Supported by the National Key R&D Program of China,No.2019YFC1315800National Natural Science Foundation of China,No.82170555+3 种基金Shanghai Rising-Star Program,No.19QA1401900Major Project of Shanghai Municipal Science and Technology Committee,No.19441905200Shanghai Sailing Program of the Shanghai Municipal Science and Technology Committee,No.19YF1406400and the 74th General Support of China Postdoctoral Science Foundation,No.2023M740675.
文摘BACKGROUND Calcifying fibrous tumors(CFTs)are rare mesenchymal lesions that can occur in various sites throughout the body,including the tubular gastrointestinal(GI)tract.AIM To analyze the clinical findings of 36 patients with GI tract CFTs to provide guidance for diagnosis and treatment.METHODS This retrospective study included 36 patients diagnosed with CFTs of the GI tract.We collected demographic and clinical information and conducted regular follow-ups to assess for local recurrence.RESULTS The stomach was the most commonly involved site,accounting for 72.2%of the 36 CFTs.Endoscopic mucosal resection(n=1,2.8%),endoscopic submucosal dissection(n=14,38.9%),endoscopic full-thickness resection(n=16,44.4%),and submucosal tunneling endoscopic resection(n=5,13.9%)were used to resect calcifying fibrous tumors.Overall,34(94.4%)CFTs underwent complete endoscopic resections with a mean procedure time of 39.8±29.8 min.The average maximum diameter of the tumors was 10.6±4.3 cm.No complications,such as bleeding or perforation,occurred during an average hospital stay of 2.9±1.2 d.In addition,two patients developed new growth of CFTs near the primary tumor sites,and none of the patients developed distant metastases during the follow-up period.CONCLUSION GI tract CFTs are rare and typically benign tumors that can be effectively managed with endoscopic procedures.
文摘This study focused on the development and characterization of TiO<sub>2</sub>-PES composite fibers with varying TiO<sub>2</sub> loading amounts using a phase inversion process. The resulting composite fibers exhibited a sponge-like structure with embedded TiO<sub>2</sub> nanoparticles within a polymer matrix. Their photocatalytic performance for ammonia removal from aqueous solutions under UV-A light exposure was thoroughly investigated. The findings revealed that PeTi8 composite fibers displayed superior adsorption capacity compared to other samples. Moreover, the study explored the impact of pH, light intensity, and catalyst dosage on the photocatalytic degradation of ammonia. Adsorption equilibrium isotherms closely followed the Langmuir model, with the results indicating a correlation between qm values of 2.49 mg/g and the porous structure of the adsorbents. The research underscored the efficacy of TiO<sub>2</sub> composite fibers in the photocatalytic removal of aqueous under UV-A light. Notably, increasing the distance between the photocatalyst and the light source resulted in de-creased hydroxyl radical concentration, influencing photocatalytic efficiency. These findings contribute to our understanding of TiO<sub>2</sub> composite fibers as promising photocatalysts for ammonia removal in water treatment applications.
基金support from the National Natural Science Foundation of China(G.Nos.52173055,21961132024,and 51925302)the Ministry of Science and Technology of China(G.No.2021YFE0105100)+3 种基金the Textile Vision Basic Research Program(No.J202201)the International Cooperation Fund of Science and Technology Commission of Shanghai Municipality(G.No.21130750100)the Fundamental Research Funds for the Central Universitiesthe DHU Distinguished Young Professor Program(G.No.LZA2020001)。
文摘The seawater desalination based on solardriven interfacial evaporation has emerged as a promising technique to alleviate the global crisis on freshwater shortage.However,achieving high desalination performance on actual,oil-contaminated seawater remains a critical challenge,because the transport channels and evaporation interfaces of the current solar evaporators are easily blocked by the oil slicks,resulting in undermined evaporation rate and conversion efficiency.Herein,we propose a facile strategy for fabricating a modularized solar evaporator based on flexible MXene aerogels with arbitrarily tunable,highly ordered cellular/lamellar pore structures for high-efficiency oil interception and desalination.The core design is the creation of 1D fibrous MXenes with sufficiently large aspect ratios,whose superior flexibility and plentiful link forms lay the basis for controllable 3D assembly into more complicated pore structures.The cellular pore structure is responsible for effective contaminants rejection due to the multi-sieving effect achieved by the omnipresent,isotropic wall apertures together with underwater superhydrophobicity,while the lamellar pore structure is favorable for rapid evaporation due to the presence of continuous,large-area evaporation channels.The modularized solar evaporator delivers the best evaporation rate(1.48 kg m-2h-1)and conversion efficiency(92.08%)among all MXene-based desalination materials on oil-contaminated seawater.
文摘BACKGROUND Solitary fibrous tumor(SFT)is a rare mesenchymal tumor that is most commonly found in the pleura but can also originate from non-pleural sites.Among the nonpleural localizations,the pancreas is extremely rare.In particular,metastasis to the pancreas from the central nervous system(CNS)is extremely rare,with only two cases reported so far.We report a case of recurrence in the pancreas 14 years after the initial complete surgical removal of a tumor in the CNS.CASE SUMMARY A 68-year-old man with a past medical history of recurrent meningeal hemangiopericytoma,currently referred to as SFT,presented to the hospital with jaundice.The patient was first diagnosed with an 8cm-sized meningeal hemangiopericytoma fourteen years ago and underwent osteoplastic craniotomy.After 16 mo,imaging showed recurrence and he underwent gamma knife radiosurgery(GKRS).2 years later,imaging showed recurrence again leading to a second GKRS.5 years later,recurrence was again suspected leading to a second craniotomy.Since then 3 years had passed,and imaging showed a 3.5cm-sized mass lesion on the pancreatic head with obstruction of the pancreatic and bile ducts.Endosonography with fine-needle aspiration biopsy was done preoperatively and aided in the diagnosis of SFT.The patient underwent pyloruspreserving pancreaticoduodenectomy.Pathologic findings of the resected pancreatic specimen,consistent with the previously resected brain specimen,confirmed the diagnosis of SFT.CONCLUSION The rarity and lack of knowledge about SFTs make suspecting and diagnosing this disease challenging.We believe that a report of metastatic pancreatic SFT from the CNS will contribute to a better understanding of this rare disease.
文摘To explore the genesis of the laminated calcite veins developed in the black shale of Chang 73 submember of the Ordos Basin,the petrology,microstructure and geochemistry of calcite veins are studied using thin sections,fluid inclusions,trace elements and isotopic geochemistry.The source,the time of formation,the mechanism of formation,and the dynamic background of the veins are discussed.The veins are mostly made up of calcite,mixed with lenticular or spindle-shape solid wall rock inclusions.Three structures are identified in the calcite minerals:fibrous,rhombic cleavage,and wedge-like structure.Trace elements and isotopes of carbon and oxygen confirm that the calcite veins were formed from a high density hydrothermal fluid.It is assumed that calcite veins formed prior to wall rock consolidation during the formation of the Qinling Orogenic Belt in the Middle and Late Triassic.The results show that the sedimentary sources of Chang 73 submember were influenced by hydrothermal materials besides terrigenous detritus.The fibrous calcite is different from the fibrous calcite reported in the morphology and mechanism of formation.In this way,the research complements and improves the morphology and the mechanism of formation of fibrous calcite.
基金The Scientific Program of the Health and Family Planning Commission of Hunan Province,China,No.C20190940The Science and Technology Planning Project of Huaihua,China,NO.2021R3117。
文摘BACKGROUND Fibrous dysplasia associated with aneurysmal bone cyst(ABC)-like changes in the right proximal femur has a low incidence.It is considered more difficult to make early diagnosis than for single fibrous dysplasia.CASE SUMMARY A 14-year-old woman was admitted because of persistent pain in the right hip and abnormal gait over the previous 2 mo.She had no history of present or past illness.Preoperative photography,enhanced computed tomography,and magnetic resonance imaging showed ground-glass appearance with cortical scalloping and expansion of the right proximal femur and femoral neck.Pathological examination by preoperative puncture biopsy revealed fibrous dysplasia of the right proximal femur.The patient was diagnosed with fibrous dysplasia based on medical history,physical examination,and results of laboratory,imaging and pathological examinations.According to final pathological examination,the patient was diagnosed with fibrous dysplasia of the right proximal femur associated with ABC.Curettage and allograft along with fixation of compression screws was performed for fibrous dysplasia associated with ABClike changes.No obvious allograft absorption,loosening of fixation,or secondary fracture were observed during 6-months’follow-up with re-examination by plain radiography and computed tomography.Fibrous dysplasia associated with ABClike changes in the right proximal femur has a low incidence and early diagnosis is considered more difficult than for single fibrous dysplasia.CONCLUSION We report a cases of fibrous dysplasia associated with ABC-like changes in the right proximal femur treated with curettage and allograft along with hip compression screws.
文摘BACKGROUND Angiomatoid fibrous histiocytoma(AFH)is a rare,slow-growing soft tissue tumor.It appears mostly on the limbs and trunk in children and young adults.The biology of AFH remains unclear because of the small number of reported cases.Diagnostic testing does not provide definitive results.It has two clinical forms,that differ in terms of gene expression and clinical prognosis.It is important to inform the laboratory which specific gene testing is necessary.Here,we describe a case of rare AFH in the submandibular region using a full genetic panel.CASE SUMMARY A 13-year-old boy who had been misdiagnosed in the past 6 mo by his dentist visited our clinic because of a lesion in the submandibular area on the right side.The lesion was homogeneous and painless upon palpation.No skin discoloration was observed.Due to the non-specific radiological picture computed tomography(CT),magnetic resonance imaging(MRI),cone-beam CT(CBCT),and ultrasoundguided biopsy were performed.A venous malformation was suspected on the MRI.None of the tests provided a definitive diagnosis.Owing to the non-specific radiological findings,the patient qualified for surgical treatment.The surgical procedure included an excisional biopsy.The diagnostic testing was extended using gene rearrangements.The most distinctive gene translocation in diagnosing AFH is within the EWS RNA-binding protein 1(EWSR1)-CREB-binding protein.However,in this case,the diagnosis was confirmed by a rearrangement within the EWSR1 gene testing.CONCLUSION AFH in the submandibular location is rare,and surgical treatment with genetic evaluation defines AFH type that affects subsequent procedures.
基金The Scientific and Technological Innovation Platform of Huaihua,China,No.2022F2701The Science and Technology Planning Project of Huaihua,China,No.2021R3117.
文摘BACKGROUND Fibrous dysplasia is a congenital disorder in which normal bone is replaced by fibro-osseous tissue or irregular trabeculae of woven bone intermixed with mature collagenous tissue.A single or multiple bones are affected.This rare bone disorder has three clinical patterns including monostotic,polyostotic,and that associated with McCune-Albright syndrome.Most studies report primary fibrous dysplasia.However,a few cases of recurrent monostotic fibular fibrous dysplasia have been reported.Here,we report a therapeutic strategy for recurrent fibular fibrous dysplasia.CASE SUMMARY A 4-year-old boy was admitted for persistent pain in the left lower limb and abnormal gait over the previous 9 mo.He had no history of present or past illness.Preoperative imaging data showed erosion-like changes with bone expansion of the left middle and lower fibular segment.Tumor tissue in the fibular bone marrow cavity was removed by curettage,and rapid intraoperative pathological examination suggested fibular fibrous dysplasia.An allograft was implanted into the fibular medullary cavity.However,he was readmitted with clinical symptoms including persistent pain,abnormal gait,and local swelling at the age of 6 years.He was diagnosed with recurrent fibular fibrous dysplasia based on the second medical examination.He underwent fibular bone tumor radical resection and longus fibular allograft transplantation combined with fibular bone locking plate and screws.Good host bone to allogenic bone graft fusion was observed by the physician on postoperative regular follow-up.CONCLUSION Radical resection of fibrous dysplasia and longus fibula allograft combined with internal fixation for reconstruction are suitable for the treatment of recurrent monostotic fibular fibrous dysplasia.
基金Project (50930005) supported by the National Natural Science Foundation of ChinaProject (U0834002) supported by the Key Programof NSFC-Guangdong Joint Funds of China+1 种基金Project (LYM09024) supported by Training Program for Excellent Young Teachers withInnovation of Guangdong University, ChinaProject (2009ZM0121) supported by the Fundamental Research Funds for the CentralUniversities of South China University of Technology,China
文摘A procedure of low temperature solid-phase sintering（LTSS） was carried out to fabricate sintered metal fibrous media（SMFM） with high specific surface area.Stainless steel fibers which were produced by cutting process were first plated with a coarse copper coating layer by electroless plating process.A low-temperature sintering process was then completed at about 800 °C for 1 h under the protection of hydrogen atmosphere.The results show that a novel SMFM with complex surface morphology and high specific surface area（0.2 m2/g） can be obtained in this way.The effect of sintering temperature on the surface morphology and specific surface area of SMFM was studied by means of scanning electron microscopy and Brunauer-Emmett-Teller.The damage of micro-structure during the sintering process mainly contributed to the loss of specific surface area of SMFM and the optimal sintering temperature was 800 °C.
基金Project (20090162120080) supported by Doctoral Fund of Ministry of Education, ChinaProject (20070410989) supported by China Postdoctoral Science FoundationProject(748310000) supported by Central South University Science Foundation for Youths, China
文摘A novel precursor of nickel-cobalt alloy powders with an appropriate Ni to Co molar ratio was prepared under selectively synthetic conditions. The composition and morphology of the precursor were characterized by X-ray diffractometry （XRD）, scanning electron microscopy （SEM）, Fourier transform infrared spectrometry （FT-IR） and energy dispersive spectrometry （EDS）. The effects of pH value, reaction temperature, metal ion concentrations and surfactant on the morphology and the dispersion of precursor were investigated. The results show that the morphology of precursor depends on ammonia content in the precursor. A fibriform precursor is a complicated ammonia-containing nickel-cobalt oxalate. The uniform shape-controlled fibrous precursor is obtained under the following optimum conditions： ammonia as complex agent as well as pH adjustor, oxalate as coprecipitator, 50-65 °C of reaction temperature, 0.5-0.8 mol/L of total concentration of Ni2＋ and Co2＋, PVP as dispersant, and pH 8.0-8.4.
基金Project(2010FJ3012)supported by the Science and Technology Plan Foundation of Hunan Province,China
文摘Fibrous particulate precursor was obtained by precipitation transformation in the ternary solution system of ammonium oxalate, nickel chloride and ammonia. The composition and morphology of precursor were characterized by XRD, SEM, IR and DTA/TGA analyses. The results show that the chemical composition and morphology of precursor precipitates at pH=8.4？8.8 are different from those of precursor precipitates at pH=6.0, and the mechanisms of the thermal decomposition of the precursors are different. The effects of various conditions in the process of thermal decomposition, including precursor morphology, atmosphere, temperature and time on the morphology and dispersion degree of obtained nickel powders were studied in detail. The final product inherits the morphology of precursor when the thermal decomposition is conducted under a weakly reducing atmosphere at temperature range of 400？440 °C for 30 min. Fibrous nickel powder can be produced with good dispersion, and its shape changes from smooth, straight and compact fiber into loose and curved fiber with rough surface.
文摘Calcifying fibrous tumor(CFT)is a rare mesenchymal lesion that has been documented throughout the gastrointestinal tract.Gastrointestinal CFTs may occur at virtually any age,with a predilection for adults and for females.They occur most commonly in the stomach and the small and large intestines.CFTs are most often found incidentally,cured by local resection,and have a low risk of recurrence.Histology shows three characteristic features:Spindle cell proliferations within a densely hyalinized stroma,scattered calcifications,and lymphoplasmacytic inflammation.CFTs are immunoreactive for CD34,vimentin and factor XIIIa,helping to distinguish them from other benign mesenchymal neoplasms.The differential diagnosis of CFTs includes sclerosing gastrointestinal stromal tumor,leiomyoma,schwannoma,solitary fibrous tumor,inflammatory myofibroblastic tumor,plexiform fibromyxoma,fibromatosis,sclerosing mesenteritis,and reactive nodular fibrous pseudotumor.The pathogenesis of CFTs remains unclear,but some have hypothesized that they may be linked to IgG4-related disease,inflammatory myofibroblastic lesions,hyaline vascular type Castleman disease,sclerosing angiomatoid nodular transformation of the spleen,or trauma.
文摘BACKGROUND Solitary fibrous tumor of the liver (SFTL) is a rare occurrence with a low number of cases reported in literature. SFTL is usually benign but, 10%-20% cases are reported to be malignant with a tendency to metastasize. The majority of malignant SFTL cases are associated with a paraneoplastic hypoglycaemia defined as Doege-Potter syndrome. Surgery is the best therapeutic treatment, however, long- life follow-up is recommended. CASE SUMMARY A 74-year-old man, was admitted to the emergency department after a syncopal episode with detection of hypoglycaemia resistant to medical treatment. The computed tomography revealed a solid mass measuring 15 cm of the left liver. An open left hepatectomy was performed with complete resection of tumor. Histopathological analyses confirmed a malignant SFTL. CONCLUSION Large series with long-term follow-up have not been published neither have clinical trials been undertaken. Consequently, the methodical long-term followup of surgically treated SFTLs is strongly recommended.
文摘BACKGROUND Solitary fibrous tumor(SFT)is a rare fibroblastic mesenchymal neoplasm that affects spindle cell soft tissues with broad-spectrum biological behavior;it is predominantly benign,and rarely metastasizes.SFT occurs mainly in the tissue structure of the serosa in the pleura and the thorax,and can be found throughout the body,though extra-thoracic localization,including the cephalic region,is uncommon.We reported the first case of intracranial malignant SFT metastasized to the chest wall.CASE SUMMARY An 81-year-old Japanese man was referred to our hospital due to progressive gait disturbance and appetite loss.His medical history included partial resection due to brain tumor,four times,and 50-Gray radiation therapy at another hospital,starting when he was 74 years old.An unenhanced head computed tomography(CT)scan revealed an 8 cm×5.1 cm×6.5 cm mixed-density mass at the left frontal lobe,accompanying a midline shift,and an unenhanced chest-abdomen CT scan revealed a 6 cm×4.1 cm×6.5 cm low-density mass in the left chest wall.A CT-guided percutaneous lung biopsy was performed,and the pathological findings were SFT corresponding to brain tumor.Finally,the correct diagnosis of his brain tumor in history of past illness revealed to be SFT,and the unremovable tumor,namely present brain lesions enlarged and metastasized to the chest wall.We established a definitive diagnosis of intracranial malignant SFT metastasized to the chest wall.We notified him and his family of the disease,and offered palliative care.He passed away on the 29 th hospital day.CONCLUSION This case suggests the need for careful,detailed examination,and careful followup when encountering patients presenting with a mass.
