胃肠道外间质瘤的CT影像诊断分析

THE CLINICAL AND PATHOLOGICAL FEATURES OF CT IN DIAGNOSIS OF EXTRAGASTROINTESTINAL STROMAL TUMOR

目的探讨胃肠道外间质瘤(EGIST)的CT影像表现及其临床意义。方法对收治的11例经手术病理证实的EGIST患者的CT表现进行回顾性分析,并与22例胃肠道间质瘤(GIST)患者资料作为对照。结果 EGIST组肿瘤位于肠系膜5例、腹膜后3例、腹腔及盆腔2例、卵巢1例。CT显示肿瘤呈圆形或不规则结节状,平扫呈不均匀密度减低,实性部分增强扫描肿块轻至中度不均匀强化,静脉期强化较明显;GIST组中13例CT表现为形态不规则,边缘模糊或与邻近组织结构分界不清,呈分叶状;9例呈类圆形,边界较清楚,形态规则;平扫时密度不均匀25例,密度均匀7例,增强扫描均有不同程度的强化,静脉期强化较明显。两组病理学特征基本相似。结论 EGIST因与GIST其生长方式及部位有差异而具有其自身的影像特征,多层螺旋CT对EGIST的术前诊断及鉴别诊断有重要意义。

Objective The value of the diagnostic and clinical the investigate CT manifestations of extragastrointestinal stromal tumor （EGIST）. Method CT findings of 11 patients with EGIST confirmed by surgery and pathology were retrospectively analyzed, and 22 cases of gastric stromal tumor （GIST） as the control group. Result The tumors in the EGIST group were located in 5 cases, 3 cases, 2 cases, cases of ovary and 1 cases of ovary. CT showed tumors were round or irregular nodular, plain scan showed heterogeneous density was lower and enhance the solid part of the scanning mass mild to moderate inhomogeneous enhancement and venous phase enhanced obviously ; Gist group in 13 eases of CT manifestations for irregular shape, blurred edges or with adjacent structures of the unclear boundaries, lobulated, 9 eases were round or oval in shape, with clear border, morphological rules, plain scan density inhomogeneity in 25 cases, 7 eases showed homogeneous density and enhanced scanning showed different degrees of strengthening, venous phase enhanced significantly. The pathological features were similar in the two groups. Conclusion EGIST are difterent locations and growth patterns form GIST. So EGIST have certain imaging characteristics and CT was valuable in preoperative diagnosing and differential diagnosing EGIST.