胃肠道间质瘤的CT诊断

目的 分析、提高对胃肠道间质瘤(gatrointestinal stromal tumor,GIST)的CT表现及诊断价值.方法 收集经病理证实的胃肠道间质瘤17 例,回顾性分析其CT表现.结果 17 例胃肠道间质瘤中位于胃9 例,小肠7 例,结肠1 例.CT表现为肿块内常见出血、坏死及囊变,实质部分强化明显,囊变坏死部分强化不明显,静脉期强化较动脉期明显.结论 CT对GIST诊断有一定价值,有时与平滑肌肿瘤及神经源性肿瘤鉴别困难,最终诊断需要病理免疫组化.

Diagnosis of GIST by CT

Objective To improve the diagnosis of gastrointestinal stromal tumor(GIST) by analyzing the CT images of patients with GIST.Methods Seventeen patients with GIST confirmed through pathology verification were collected and their CT images were analyzed retrospectively.Results Among the 17 patients,there were 9 cases in stomach,seven cases in small intestine,and 1 case in colon.The main display of CT were hemorrhage,necrosis and cystic change within the tumor.The enhancement of parenchyma was clear while that of putrescence was not.The enhancement of venous phase was clearer than that of arterial phase.Conclusion CT has certain value in the diagnosis of GIST. Sometime it is hard to differentiate leiomyoma with neurogenic tumor,thus the immunohistochemistry(IHC) is needed to make a final diagnosis.