胃肠道间质瘤MSCT的诊断

MSCT diagnosis of gastrointestinal stromal tumor

目的探讨胃肠道间质瘤(Gastrointestinal stromal tumor,GIST)的MSCT影像表现和诊断价值。方法回顾性分析8例经手术病理证实的GIST的MSCT表现。使用Siemens sensation4或16层螺旋CT检查,7例平扫+增强,1例仅平扫。增强检查使用非离子型对比剂,用量80～100ml,用自动压力注射器经肘静脉给予,流率2～3ml/s。在图像工作站上对原始扫描数据进行薄层重建及多方位重建。结果胃间质瘤4例,十二指肠间质瘤2例,网膜间质瘤2例。肿瘤直径<5cm者5例,直径6～10cm者2例,直径>10cm者1例。术前CT定性正确7例,定位正确6例。手术病理报告:高度侵袭风险5例,中度侵袭风险1例,低度侵袭风险1例,极低度侵袭风险1例。结论GIST的MSCT表现有一定特征性,可帮助术前定位、定性和分级。

Objective To evaluate the imaging features and diagnostic value of gastrointestinal stromal tumor. Methods MSCT findings of 8 cases of GIST confirmed by surgical pathology were analyzed retrospectively. Plain and enhanced scanning （7 cases） and only plain scanning （1 case） were examined by Siemens sensation 4 or 16-slices CT scanner. Non-ionic contrast medium was administrated by the automatic pressure syringe with total volume 80-100 ml and the flow rate of 2-3ml/sec. Based on the original image data ,various imaging reconstructions were performed on the Wizard workstation. Results In the 8 cases of GIST, 4 cases were located on the stomach, 2 cases on the duodenum, and 2 cases on the omentum. The diameter of tumor 〈 5cm was 5 cases, the diameter of 6-10 cm was 2 cases, the diameter 〉 10cm was 1 case. Correctly qualitative diagnosis of the tumors was made with CT in 7 cases, 6 cases were correctly localiged by CT before operation. Surgery pathology report： highly attack risk 5 cases, moderate attack risk 1 case, low attack risk 1 case, extremely low attack risk 1 case. Conclusion GIST has some imaging features. MSCT can be help the locating, qualitative and staging diagnosis.