胃间质瘤的影像诊断

目的 探讨胃间质瘤(GST)的影像诊断价值。方法 收集经手术和病理证实的GST 8例进行回顾性分析，8例均行螺旋CT平扫和增强扫描，其中3例行MRI平扫和增强扫描，5例行上消化道气钡双重造影检查(GI)。结果 肿瘤均单发，5例位于胃体，3例位于胃底，圆形或类圆形7例，分叶状1例，直径3．8—14．8cm，平均7．9cm；CT平扫肿块密度不均匀，增强扫描中度不均匀强化，以静脉期明显；MRI平扫肿块信号不均匀，增强扫描不均匀强化；GI提示胃黏膜撑开，可见龛影。病理检查7例恶性，1例良性。结论 多种影像检查相结合，有利于GST的定位诊断和良恶性判断。

Imaging diagnosis of gastric stromal tumor

Objective To evaluate the radiological diagnosis in gast ri c stromal tumors (GST). Method The imaging findings were retrospectively studied in 8 cases of GST. All the cases were proved by operation and pathology. Non-contrast and contrast spiral CT scan were done in all cases. Non-enhanced and enhanced MRI was performed in 3 cases. Gastro-intestinal barium study was perf ormed in 5 cases out of 8. Results All the tumors were solitary lesion. The tum or was located in the corpus gastricus in 5 cases and three mass were found in t he cardiac portion. Round mass was found in 7 cases, while the mass was lobulate d in the rest one case. The tumors measured 3.8-14.8cm, 7.9cm in average. Tumo rs presented in-homogenous in density or intensity, and moderate and in-homo genous enhancement, which was best visualized in venous phase. Tumors presented in-homogenous signal intensity, and in-homogenous enhancement. The findings of GI examination were expanded mucosal folds and niche. Seven cases were malign ant and one was benign. Conclusion Integrating various imaging modalities, it i s a propitious approach to make diagnosis on both the location and the nature of the GST.