恶性胃肠道间质瘤的CT特点15例分析

[目的]分析恶性胃肠道间质瘤(GIST)的CT特点.[方法]回顾性分析经手术病理证实的恶性GIST 15例,发生于胃6例,小肠4例,食管1例,直肠1例,小肠系膜2例,结肠系膜1例.术前12例均行CT平扫和增强扫描.3例仅平扫.[结果]恶性GIST平扫CT表现:病灶体积均大于5cm;胃肠道壁增厚4例,圆形或类圆形肿块11例;增强扫描后中度强化或明显强化.[结论]CT对恶性胃肠道间质瘤有一定的诊断价值.

An Analysis of CT Features in 15 Cases with Malignant Gastrointestinal Stromal Tumor

To explore the CT features of malignant gastrointestinal stromal tumor (GIST). A total of 15 cases with malignant GIST pathologically was retrospectively analyzed. The tumors originated from the stomach (n=6), small bowl (n=4), esophagus (n=1), colon(n=1), small intestine mesentery (n=1), colon mesentery (n=1). All of them underwent CT study before operation. Twelve cases were scanned with contrast enhanced scanning, but 3 cases without enhanced scanning. All lesions revealed more than 5cm in diameter. Eleven lesions showed heterogeneous soft-tissue masses round in shape, 4 lesions showed thickening of bowl wall. The lesions revealed middle or marked enhancement after injection with contrast medium. [Conclusion] CT is valuable in diagnosing of malignant GIST.