超声和CT对胃肠道间质瘤的诊断分析

Ultrasonography and CT manifestations of gastrointestinal stromal tumor

目的:探讨超声和CT对胃肠道间质瘤(gastrointestinal stromal tumors,GIST)的诊断价值。方法:回顾性分析经手术病理证实的28例胃肠道间质瘤的超声和CT表现。结果:28例胃肠道间质瘤中原发24例,复发4例。6例位于胃,22例位于肠道。超声显示肿瘤内部回声分为实性低回声型与囊实混合回声型,彩色多普勒血流显示肿物内部和边缘部见彩色血流点条状或环形分布。CT表现为平扫肿块密度均匀或欠均匀,多数有坏死、囊变,增强扫描实性部分强化均匀或不均匀,静脉期强化较动脉期更明显。结论:GIST的CT和超声表现没有特异性,但两者联合应用对其定位准确,对肿瘤良、恶性的判别及预后的估计有重要价值。

Objective： To investigate the value of ultrasonography and CT in the diagnosis of gastrointestinal stromal tumors（ GIST）. Methods： The ultraosongraphy and CT manifestations of 28 patients with GIST confirmed by operation and pathology were analyzed retrospectively. Results： Of the 28 patients 24 were primary,4 were recurrent. The lesions location： 22 in intestinal tract,6 in stomach. The internal echogenicity of the tumors were hypoecho heterogeneous or cystic-solid mixed,and the blood flow can be detected intra and around the tumors,puncto-striatus or ring form distributing. With CT,the tumors manifested homogeneous or non-homogeneous texture and cystic or necrotic changes could be seen. After contrast medium were injected,the parenchyma of tumors was intensified and enhancement was more obvious in the arterial phase than in the veinous one. Conclusion： GIST shows no characteristic features in both ultrasonography and CT. However,ultrasonography combining with CT can precisely localize GIST,and plays significant role in differentiating benign and malignant GIST and determinating their prognosis.