胃肠道间质瘤的影像学表现

Imaging diagnosis of gastrointestinal stromal tumors

目的分析胃肠道间质瘤(GIST)的影像学表现,以提高对GIST的诊断水平。方法回顾性分析18例GIST的临床及影像学资料。结果病灶分布于胃14例,小肠3例,升结肠1例。肿瘤平均直径6.8cm。临床表现多为腹部不适(12/18),腹痛(11/18),消化道出血(7/18),肠梗阻(2/18)。主要影像学表现为黏膜下富血供肿块,境界清晰光整,外生性为主,肿块内出血、坏死、囊变明显,但局部淋巴结无转移。结论GIST的消化道造影及CT表现有一定的特征性,对诊断有一定的价值,但定性需依赖免疫组化和电镜检查。

Objective To improve the ability of imaging diagnosis of gastrointestinal stromal tumours（GIST） through analyzing imaging findings of GIST. Methods The clinical and imaging data of 18 patients with GISTs were analyzed and summarized. Results Tumors located in the stomach were found in 12 cases, small bowel in 3 cases, and ascending colon in 1 case. The average size in diameter was 6. 8 cm. The common symptoms were vague abdominal discomfort（ n = 12）, abdominal pain（ n = 11 ）, and gastrointestinal tract bleeding（ n = 7）. The main imaging findings included submucous hypervascular lesions with well - definite margins, predominating exogenic growth, and obvious intratumorsl hemorrhage, necrosis , and cystic changes but no metastases of local lymphonodi were observed. Conclusion The GI and CT scanning of GISTs can reveal some characteristic signs which are helpful to diagnose correctly this disease, however, the qualitative diagnosis needs depending on immunohistochemical and electromicroscopic examinations.