摘要
目的分析胃肠道间质瘤(gastrointestinal stromal tumors,GIST)的螺旋CT(multi-detector row spiralcomputeel Tomography,MSCT)表现,评价其对该病的诊断价值。方法回顾性分析2000年3月—2010年10月经手术病理证实的32例GIST的MSCT表现,并将其与病理的生物学危险性进行对比研究。结果病理高、中、低及极低危险性GIST依次为15、6、7、4例。GIST主要CT表现,肿块腔外生长为主,大部分病灶边界清楚,呈类圆形或分叶状,密度均匀或不均匀,3例可见钙化,GIST增强静脉期强化较动脉期更明显,局部均无淋巴结转移,转移到肝脏的4例,同时伴前腹壁转移1例。15例肿块长径≥5cm,密度多不均匀,可有囊变、坏死、出血等,增强不均匀强化,其中11例病理为高风险性;17例肿块长径<5cm的病灶中,大多中度均匀强化,其中13例为中度及以下危险性。结论 GIST患者的MSCT表现具有一定的特征性,MSCT对准确定位、术前估计肿瘤的风险级别、术后随访有重要价值。
Objective To investigate the imaging features of multi-slice spiral CT（MSCT） for gastrointestinal stromal tumors（GIST） and its diagnostic value.Methods We retrospectively analyzed the MSCT manifestations of 32 cases of GIST confirmed by operation and pathology between March 2000 and October 2010.Comparative study was then carried out between MSCT manifestations and patho-physiological risks.Results Of the 32 GIST lesions,15 presented with high biological risks,six moderate risks,seven low risks and four very low risks.The MSCT results manifested the following main features.Exophytic growth was predominating;Most lesions were with well-defined margins,and were rotund or lobular in shape with homogeneous or heterogeneous density.Three lesions manifested calcification.The enhancement degree of GIST in portal vein phase was more obvious than in arterial phase.There was no metastasis to local lymph nodes.Hepatic metastasis occurred in four cases,one of which was accompanied with anterior abdominal wall metastasis.Of the 15 lesions with maximal diameter longer than 5 cm,MSCT showed obvious cystic changes,necrosis or hemorrhage within the mass most of which was in heterogeneous density,and heterogeneous enhancement;Eleven out of the 15 lesions were at high risk.Among the 17 lesions with maximal diameter shorter than 5 cm,MSCT showed homogeneous enhancement,and 13 of them were at moderate risk or below.Conclusion The MSCT imaging of GIST manifests some certain characteristics.It is valuable in locating the lesion precisely,estimating the risk level of the tumor,and postoperative follow-up for patients with GIST.
出处
《华西医学》
CAS
2011年第5期698-701,共4页
West China Medical Journal
关键词
胃肠道间质瘤
体层摄影术
CT
Gastrointestinal stromal tumors
Tomography
CT
