CT对胃肠道间质瘤的诊断价值

Diagnostic value of CT to gastrointestinal stromal tumor

目的探讨胃肠道间质瘤的多层螺旋CT影像特征及诊断价值。方法回顾性分析经手术组织病理证实30例胃肠道间质瘤患者的CT影像资料。结果肿瘤位于胃部19例,小肠8例,大网膜及肠系膜3例;良性19例,潜在恶性2例,恶性9例;肿块多呈圆形或类圆形,黏膜下型8例,浆膜下型12例,肌壁间型7例,胃肠道外型3例;黏膜下肿瘤血液供应丰富,向腔外生长,多数密度不均匀,内部可发生囊变或坏死,少数见出血、钙化及气体影;肿瘤实质部分大多中等至明显强化,静脉期进一步强化。结论双期增强扫描可准确显示胃肠道间质瘤发病部位、形态、大小,对其诊断有重要价值。

Objective To investigate the spiral CT features of gastrointestinal stromal tumor（GIST） and its diagnostic value.Methods CT features were retrospectively analyzed in 30 cases of surgically and pathologically proved GIST.Results The tumors were originated from stomach in 19 cases,from small bowel in 8 cases,and from omentum and mesentery in 3 cases,in which there were 19 cases of benign tumor,2 cases of potential malignancy and 9 cases of malignant carcinoma.The tumors were mainly round or oval in shape.There were 4 types of tumor,including sub-mucosa type（n=8）,subserosa type（n=12）,myo-intramural type（n=7） and extra-gasrtointestinal type（n=3）.The tumors with abundant vascularity at submucosa tended to exoluminal growth,most tumors showed cystic degeneration or necrosis,and part of them showed haemorrhage,calcification and further enhancement during venous phase.Conclusion Two-phase multi-slice spiral CT examination can detect the location,shape and size of GIST,and it is of a great value to the diagnosis of tumors.