摘要
目的探讨胃肠道间质瘤的影像特点。方法收集26例经手术病理证实的胃肠道间质瘤的CT资料进行回顾性分析。结果发生于胃17例,小肠7例,结肠2例;CT平扫肿块呈软组织密度,密度均匀者8例,瘤内有低密度坏死者18例,肿块内有钙化者5例,边缘清晰者19例。增强扫描时肿瘤实质区明显强化,CT增值在20～60HU,内部坏死囊变区无强化;其中良性5例,恶性21例。免疫组化26例均显示CD34阳性。依据肿瘤的肉眼病理结构差别,将其CT表现形式概分为实体型、小灶坏死型、大灶坏死囊变型。结论胃肠道间质瘤的CT表现有一定的特征性,对预测良恶性和估计预后有较好作用。
Objective To explore imaging features of gastrointestinal stromal tumor(GIST). Methods CT findings were retrospectively analyzed in 26 cases with surgically and pathologically proved GIST. Results Among the 26 cases,17 masses were located in stomach, 7 in small intestine and 2 in rectum. On non-contrast enhanced CT scan, the density of masses is equal to that of soft-tissue. The lesions were homogenous in 8 cases; hypo-dense necrosis was found within the les ions in 18 cases; calcification was revealed in 5 cases; and well demarcated les ions were demonstrated in 19 cases. In contrast enhanced scan, remarkable enhanc ement was seen in the parenchyma of the tumor, CT value increased from 20-60 HU , while no enhancement was revealed in the necrosis and cystic area of the tumor . Five cases out of 26 had been diagnosed as benign GIST, while malignant GIST was determined in the other 21 cases. CD34 antibody was positive in all 26 cases. Depending on the pathological findings, the CT manifestations of tumors may be classified as substantial lesions, lesions with small necrosis and lesions with large necrosis and cystic change. Conclusion There are characteristic CT manifes tations of GIST, helpful in determining the pathological nature ofthe GIST and the prognosis.
出处
《影像诊断与介入放射学》
2005年第2期90-93,共4页
Diagnostic Imaging & Interventional Radiology
