胃间质瘤的CT诊断:24例分析

背景:胃间质瘤(GST)的术前诊断主要依靠内镜和影像学检查。为提高GST的术前诊断水平,有必要对其CT诊断和术后病理诊断进行比较研究。目的:明确CT对GST的诊断价值。方法:24例于2002年1月～2008年6月在浙江省三门县人民医院确诊的GST患者纳入研究,对其CT和组织病理学表现进行回顾性分析。结果:24例GST均为单发,直径1.3～12.5 cm,5 cm者13例,≥5 cm者11例。4例肿瘤位于胃腔内,14例完全位于胃腔外,6例骑跨胃腔内外。CT平扫肿块密度均匀8例,密度不均16例(其中4例肿块内出现气体影)。CT诊断恶性9例,可疑恶性倾向6例,良性9例;病理诊断恶性10例,交界性5例,良性9例。仅1例患者CT诊断与病理诊断不符。结论:GST的CT表现有一定特点,CT扫描对GST的术前诊断和良恶性判断具有重要价值。

CT Diagnosis of Gastric Stromal Tumor: Analysis of 24 Cases

Background： Preoperative diagnosis of gastric stromal tumor （GST） depends mainly on endoscopy and imaging examination. For improving the preoperative diagnostic level of GST, a comparative study on the coincidence of CT and postoperative pathologic diagnosis should be performed. Aims： To determine the diagnostic value of CT in GST. Methods： Twenty-four cases of GST diagnosed in Sanmen People＇s Hospital, Zhejiang Province from Jan. 2002 to Jun. 2008 were enrolled. The CT and histopathologic features were analyzed retrospectively. Results： The GST in all 24 cases were solitary, of which the diameter ranged from 1.3 cm to 12.5 cm. Thirteen GST had their diameter less than 5 cm, while 11 were 95 cm. Four GST were located intraluminally, 14 were extraluminal, and 6 were transmural. Eight GST showed homogenous density on plain scanning, whereas 16 were heterogeneous with gas in 4. Malignancy was diagnosed in 9 cases By CT, malignant suspected in 6, and benign in 9. In pathologic diagnosis, malignancy was found in 10 eases, borderline in 5, and benign in 9. Only in one case the diagnosis by CT and pathology was different. Conclusions： The CT features of GST are characteristic, which has important value in the preoperative diagnosis of GST and in the differentiation between malignant and benign lesions.