胃肠道间质瘤的螺旋CT诊断价值

目的 分析胃肠道间质瘤(gastrointestinal stromal tumors,GIST)的螺旋CT(multi-detector row spiral computeel 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GIS...

The Diagnostic Value of Multi-slice Spiral CT for Gastrointestinal Stromal Tumors

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.