16排螺旋CT对胃肠间质瘤的诊断价值

目的评价16排螺旋CT扫描检查对胃肠道间质瘤（GIST）的诊断价值。方法回顾性分析经病理证实的27例胃肠道间质瘤患者的MSCT资料。结果CT能够准确显示所有肿块的部位、大小、形态，并能判断肿瘤对周围组织结构有无侵犯、有无远处转移。27例GIST中发生于胃19例，十二指肠2例，空回肠6例。肿块多呈圆形或类圆形（21例），增强扫描动脉期肿瘤均有所强化，静脉期持续强化。低度恶性11例，肿块直径多〈5cm，边界清楚，密度均匀，增强后多均匀强化；中高度恶性16例，肿块直径多〉5cm，边界多不清楚，15例肿块内有坏死、液化，密度不均匀，增强后不均匀强化，瘤内点状钙化1例，4例出现转移灶。结论CT检查对于GIST定位准确，其CT表现具有一定的特征性，为肿瘤恶性的判断提供依据，为GIST的治疗方案及手术后或化疗后患者的随访提供重的信息。

Value of 16 - slices spiral - CT in the diagnosis of gastrointestinal stromal tumors

Objective To evaluate the value of 16 - slices spiral - CT in the diagnosis of gastrointestinal stromal tumors （GISTs）. Methods The multi - slice CT features of 27patients with GIST confirmed by operation and pathology were retrospectively analyzed. Results The location, size and shape of GIST could be accurately displayed on CT in all cases, as well as whether tumors invaded tile surrounding structures and had distant metastases. In the 27 GISTs, the tumors originated from stomach （ n = 19）, duodenum （u = 2） and jejunoileum （n = 6）. The masses were mainly round or oval in shape （n = 21 ）. Enhancement was evident in the arterial phase, then continuously enhanced in the vein phase. In the 27 GISTs, low degree malignancy was showed in 11 tumors and high degree malignancy was showed in 16 tumors. The former was usually 〈 5cm in diameter with well - defined margin and homogeneous in density, homogeneous enhancement was showed after contrast administration. As for the high degree malignant lesions, they were ill - defined and 〉 5cm in diameter, with necrotic and liquefied areas were found in the tumor （n = 15）. tteterogeneous enhancement could he assessed afler contrast, 1 case appeared spotted calcification, and distal metastases were showed in 4 cases. Conclusion CT can precisely display the accurate localization of GIST which have some specific CT findings and provide the information for judging the degree of malignancy, and provide the information for treatment planning and follow - up of patients after treated with surgery or chemotherapy.