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目的:探讨多层螺旋CT在胃肠道间质瘤(GIST)定位和定性中的诊断价值。方法:对本院30例手术病理证实为胃肠间质瘤的患者的CT影像特点进行回顾性分析。均行16层螺旋CT平扫和增强扫描,探讨病灶位置、大小及有无坏死等情况。结果:胃肠道间质瘤单发患者21例、多发9例;其中17例肿瘤部位在胃部、8例位于小肠、5例位于直肠。19例向腔内外同时生长、8例向腔外生长、3例向腔内生长。恶性GIST强化不均匀,可有邻近脏器侵犯。16层螺旋CT定性准确率为83.3%(25/30)、定位准确率90.0%(27/30)。结论:CT增强扫描有利于GIST的定位诊断及对肿瘤良恶性质的判断,能准确显示肿瘤的部位、形态、大小,是目前检查GIST的重要方法之一。
Objective: To investigate the diagnostic value of multislice spiral CT in the localization and characterization of gastrointestinal stromal tumors (GIST). Methods: The CT features of 30 patients with gastrointestinal stromal tumors confirmed by surgery and pathology in our hospital were analyzed retrospectively. All patients underwent 16-slice spiral CT scan and enhanced scan to investigate the location, size and necrosis of the lesions. Results: Twenty-one patients with gastrointestinal stromal tumors were single and 9 were multiple. Among them, 17 were located in the stomach, 8 in the small intestine and 5 in the rectum. 19 cases grow simultaneously to the inside and outside of the cavity, 8 cases grow to the outside of the cavity and 3 cases grow into the cavity. Malignant GIST enhanced uneven, may have violations of nearby organs. Qualitative 16-slice spiral CT accuracy was 83.3% (25/30), positioning accuracy 90.0% (27/30). Conclusion: CT enhanced scan is helpful for the localization diagnosis of GIST and judgment of benign and malignant tumors. It can accurately display the location, shape and size of the tumor and is one of the important methods for the examination of GIST.