BACKGROUND Myxofibrosarcoma(MFS)is a fibroblast-derived sarcoma that mainly occurs in subcutaneous tissue.MFS rarely occurs in the gastrointestinal tract,especially in the esophagus.CASE SUMMARY A 79-year-old male pat...BACKGROUND Myxofibrosarcoma(MFS)is a fibroblast-derived sarcoma that mainly occurs in subcutaneous tissue.MFS rarely occurs in the gastrointestinal tract,especially in the esophagus.CASE SUMMARY A 79-year-old male patient was admitted to our hospital for dysphagia for a week.Computed tomography and electronic gastroscopy showed that a giant mass was located 30 cm from the incisor and extended to the cardia.There was incomplete esophageal stenosis.Endoscopic pathology showed spindle cell lesions,which were considered inflammatory myofibroblast like hyperplasia.Considering the strong demands of the patient and his family,and the fact that most inflammatory myofibroblast tumors are benign,we decided to perform endoscopic submucosal dissection(ESD)even if the tumor size was giant(9.0 cm×3.0 cm).Postoperative pathological examination resulted in a final diagnosis of MFS.MFS rarely occurs in the gastrointestinal tract,especially in the esophagus.Surgical resection and local adjuvant radiotherapy are the first choices to improve the prognosis.This case report firstly described the ESD for esophageal giant MFS.It suggests that ESD may be an alternative treatment for primary esophageal MFS.CONCLUSION This case report for the first time describe the successful treatment of a giant esophageal MFS by ESD,suggesting that ESD may be an alternative treatment for primary esophageal MFS,especially in elderly high-risk patients with obvious dysphagia symptoms.展开更多
BACKGROUND Trismus is a common problem with various causes.Any abnormal conditions of relevant anatomic structures that disturb the free movement of the jaw might provoke trismus.Trismus has a detrimental effect on th...BACKGROUND Trismus is a common problem with various causes.Any abnormal conditions of relevant anatomic structures that disturb the free movement of the jaw might provoke trismus.Trismus has a detrimental effect on the quality of life.The outcome of this abnormality is critically dependent on timely diagnosis and treatment,and it is difficult to identify the true origin in some cases.We present a rare case of trismus due to fungal myositis in the pterygoid muscle,excluding any other possible pathogenesis.CASE SUMMARY The patient presented with a 2-mo history of restricted mouth opening.Computed tomography showed obvious enlargement of the left pterygoid muscles.Furthermore,the patient had trismus without obvious predisposing causes.The primary diagnosis was pterygoid myosarcoma.Consequently,lesionectomy of the left pterygoid muscle was performed.Intraoperative frozen biopsy implied the possibility of an uncommon infection.Postoperative pathologic examination confirmed myositis and necrosis in the pterygoid muscle.Fungi were detected in both muscle tissue and surrounding necrotic tissue.The patient recovered well with antifungal therapy and mouth opening exercises.The rarity of fungal myositis may be responsible for the misdiagnosis.Although the origin of pathogenic fungi is still unknown,we believe that both hematogenous spread and local invasion could be the most likely sources.To the best of our knowledge,this is therst case in the literature that reported fungal myositis in pterygoid muscles as the only reason that results in trismus.CONCLUSION Surgeons should remain vigilant to the possibility of trismus originating from fungal myositis.展开更多
Eucommia ulmoides Oliv.(EuO),also known as Duzhong,native to China,has been reported to have antioxidative function,but its cellular mechanism is not fully examined yet.We investigated inhibitory effects of EuO leaf e...Eucommia ulmoides Oliv.(EuO),also known as Duzhong,native to China,has been reported to have antioxidative function,but its cellular mechanism is not fully examined yet.We investigated inhibitory effects of EuO leaf ethanol extracts on H2O2-induced apoptosis in rat osteoblastic MC3T3-E1 cells and underlying mechanisms.Locally-grown Duzhong leaves were extracted with ethanol.MC3T3-E1 cells were treated with EuO (6.25,12.5,25,50,and 100 μg/ml) for 24 h,and then H2O2 (800 μmol/L) for an additional 24 h.Cell survival rate,percentage of apoptosis,and expressions of caspases 3,6,7,and 9 were examined using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay,microscopic analysis,Western blotting,and reverse transcription polymerase chain reaction (RT-PCR).The final EuO leaf ethanol extract powder was detected to contain caffeotannic acid at 58 mg/g and geniposide at 3.45 mg/g by high performance liquid chromatography (HPLC).EuO remarkably restrained cell oxidative damage and increased cell survival rate in a dose-dependent manner: 0 μg/ml,0.21;6.25 μg/ml,0.28;12.5 μg/ml,0.31;25 μg/ml,0.48;50 μg/ml,0.54;and 100 μg/ml,0.66 (P<0.05),with the half-effective concentration being around 25 μg/ml.MTT results were confirmed by microscopic analysis.Western blotting and RT-PCR analyses showed that the expressions of caspases 3,6,7,and 9 were significantly decreased in the EuO-treated cells compared with the control (EuOand H2O2-free) (P<0.05),with the half-effective concentration of EuO ranging from 12.5 to 25 μg/ml.We conclude that the ethanol-extracted EuO leaf extracts promoted the growth of MC3T3-E1 cells,and suppressed the H2O2-induced apoptosis in a rat MC3T3-E1 osteogenic cell model,likely due to the inhibition of caspases’ activities.The results indicate that EuO is a potent antioxidant,which may contribute to its many cellular protective functions,including the promotion of bone growth.展开更多
An analytical solution is obtained for a rotating multiferroic composite hollow cylinder made of radially polarized piezoelectric and piezomagnetic materials. Both the number of layers and the stacking sequence of the...An analytical solution is obtained for a rotating multiferroic composite hollow cylinder made of radially polarized piezoelectric and piezomagnetic materials. Both the number of layers and the stacking sequence of the composite cylinder can be arbitrary. General mechanical, electric and magnetic boundary conditions can be applied at both the inner and outer cylindrical surfaces. The state space method is employed so that only a 2×2 matrix is involved in the whole solving procedure. In the nu-merical experiments, the distributions of elastic, electric as well as magnetic fields in an internally pressurized rotating BaTiO3/CoFe2O4 composite hollow cylinder subjected to different boundary conditions are presented graphically. The results clearly show that the stress fields in a multiferroic composite cylinder are controllable.展开更多
基金Supported by the Key Project of Jiangsu Province,China,No.ZD2022052。
文摘BACKGROUND Myxofibrosarcoma(MFS)is a fibroblast-derived sarcoma that mainly occurs in subcutaneous tissue.MFS rarely occurs in the gastrointestinal tract,especially in the esophagus.CASE SUMMARY A 79-year-old male patient was admitted to our hospital for dysphagia for a week.Computed tomography and electronic gastroscopy showed that a giant mass was located 30 cm from the incisor and extended to the cardia.There was incomplete esophageal stenosis.Endoscopic pathology showed spindle cell lesions,which were considered inflammatory myofibroblast like hyperplasia.Considering the strong demands of the patient and his family,and the fact that most inflammatory myofibroblast tumors are benign,we decided to perform endoscopic submucosal dissection(ESD)even if the tumor size was giant(9.0 cm×3.0 cm).Postoperative pathological examination resulted in a final diagnosis of MFS.MFS rarely occurs in the gastrointestinal tract,especially in the esophagus.Surgical resection and local adjuvant radiotherapy are the first choices to improve the prognosis.This case report firstly described the ESD for esophageal giant MFS.It suggests that ESD may be an alternative treatment for primary esophageal MFS.CONCLUSION This case report for the first time describe the successful treatment of a giant esophageal MFS by ESD,suggesting that ESD may be an alternative treatment for primary esophageal MFS,especially in elderly high-risk patients with obvious dysphagia symptoms.
基金Supported by Natural Science Foundation of Zhejiang Province,China,No.LQ19H160019Zhejiang Provincial Basic Public Welfare Research Project,China,No.LGF19H140006+1 种基金Zhejiang TCM Science and Technology Plan,China,No.2018ZA071,and No.2019ZA069Medical Scientific Research Foundation of Zhejiang Province,China,No.2019KY379.
文摘BACKGROUND Trismus is a common problem with various causes.Any abnormal conditions of relevant anatomic structures that disturb the free movement of the jaw might provoke trismus.Trismus has a detrimental effect on the quality of life.The outcome of this abnormality is critically dependent on timely diagnosis and treatment,and it is difficult to identify the true origin in some cases.We present a rare case of trismus due to fungal myositis in the pterygoid muscle,excluding any other possible pathogenesis.CASE SUMMARY The patient presented with a 2-mo history of restricted mouth opening.Computed tomography showed obvious enlargement of the left pterygoid muscles.Furthermore,the patient had trismus without obvious predisposing causes.The primary diagnosis was pterygoid myosarcoma.Consequently,lesionectomy of the left pterygoid muscle was performed.Intraoperative frozen biopsy implied the possibility of an uncommon infection.Postoperative pathologic examination confirmed myositis and necrosis in the pterygoid muscle.Fungi were detected in both muscle tissue and surrounding necrotic tissue.The patient recovered well with antifungal therapy and mouth opening exercises.The rarity of fungal myositis may be responsible for the misdiagnosis.Although the origin of pathogenic fungi is still unknown,we believe that both hematogenous spread and local invasion could be the most likely sources.To the best of our knowledge,this is therst case in the literature that reported fungal myositis in pterygoid muscles as the only reason that results in trismus.CONCLUSION Surgeons should remain vigilant to the possibility of trismus originating from fungal myositis.
基金Project (No.2007C33030) supported by the Science and Technology Program of Zhejiang Province,China
文摘Eucommia ulmoides Oliv.(EuO),also known as Duzhong,native to China,has been reported to have antioxidative function,but its cellular mechanism is not fully examined yet.We investigated inhibitory effects of EuO leaf ethanol extracts on H2O2-induced apoptosis in rat osteoblastic MC3T3-E1 cells and underlying mechanisms.Locally-grown Duzhong leaves were extracted with ethanol.MC3T3-E1 cells were treated with EuO (6.25,12.5,25,50,and 100 μg/ml) for 24 h,and then H2O2 (800 μmol/L) for an additional 24 h.Cell survival rate,percentage of apoptosis,and expressions of caspases 3,6,7,and 9 were examined using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay,microscopic analysis,Western blotting,and reverse transcription polymerase chain reaction (RT-PCR).The final EuO leaf ethanol extract powder was detected to contain caffeotannic acid at 58 mg/g and geniposide at 3.45 mg/g by high performance liquid chromatography (HPLC).EuO remarkably restrained cell oxidative damage and increased cell survival rate in a dose-dependent manner: 0 μg/ml,0.21;6.25 μg/ml,0.28;12.5 μg/ml,0.31;25 μg/ml,0.48;50 μg/ml,0.54;and 100 μg/ml,0.66 (P<0.05),with the half-effective concentration being around 25 μg/ml.MTT results were confirmed by microscopic analysis.Western blotting and RT-PCR analyses showed that the expressions of caspases 3,6,7,and 9 were significantly decreased in the EuO-treated cells compared with the control (EuOand H2O2-free) (P<0.05),with the half-effective concentration of EuO ranging from 12.5 to 25 μg/ml.We conclude that the ethanol-extracted EuO leaf extracts promoted the growth of MC3T3-E1 cells,and suppressed the H2O2-induced apoptosis in a rat MC3T3-E1 osteogenic cell model,likely due to the inhibition of caspases’ activities.The results indicate that EuO is a potent antioxidant,which may contribute to its many cellular protective functions,including the promotion of bone growth.
基金supported by the National Natural Science Foundation of China (Nos. 10872179 and 10725210)the Zhejiang Provincial Natural Science Foundation of China (No. Y7080298)the Zijin Plan of Zhejiang University, China
文摘An analytical solution is obtained for a rotating multiferroic composite hollow cylinder made of radially polarized piezoelectric and piezomagnetic materials. Both the number of layers and the stacking sequence of the composite cylinder can be arbitrary. General mechanical, electric and magnetic boundary conditions can be applied at both the inner and outer cylindrical surfaces. The state space method is employed so that only a 2×2 matrix is involved in the whole solving procedure. In the nu-merical experiments, the distributions of elastic, electric as well as magnetic fields in an internally pressurized rotating BaTiO3/CoFe2O4 composite hollow cylinder subjected to different boundary conditions are presented graphically. The results clearly show that the stress fields in a multiferroic composite cylinder are controllable.
