目的研究探讨胃肠间质瘤的影 像学表现，并分析其恶性判断依据。方法 选取我院收治胃肠道间质瘤患者42例作为 研究对象，回顾性分析患者的临床基本资 料以及影像学诊断资料，并将患者的影像 学表现与其病理诊断结果进行对照。结果 42例患者患者均经手术及病理证实为胃肠 道间质瘤，其中胃间质瘤、小肠间质瘤、 结肠间质瘤以及直肠间质瘤分别有14例、 18例、6例和4例；肿瘤直径在2.5cm-20cm 之间，平均直径为(13.7±2.3)cm，肿瘤 的形态为：圆形或类圆形15例，不规则 分叶形27例。其中良性胃肠间质瘤和恶性 胃肠间质瘤分别有14例和28例。经CT检查 可见，良性肿瘤的患者肿块直径均在5cm 以下，且肿瘤的密度均匀，未见显著钙化 点。恶性肿瘤的患者直径在5cm以上，瘤 体密度不均匀，且形状多不规则，在肿瘤 中心有低密度出血区，边缘与周围组织之 间分界不清，经增强扫描可见边缘有明显 强度现象，但中心未见强化。部分患者存 在淋巴结转移或者肝转移情况，累及肠系 膜。结论 胃肠道间质瘤的患者通过CT检 查，能对肿瘤的大小、形态、边缘、包膜 以及强化程度、生长方式、坏死程度等进 行比较清晰直观的观察，且根据其主要临 床表现能对肿瘤的良恶性进行鉴别，尤其 是肿瘤大小与核分裂数量是判断恶性的重 要依据，对患者的临床诊断、鉴别以及治 疗都具有十分重要的意义。

Objective To study the imaging findings of gastrointestinal stromal tumor, and analyzes its malignant judgment. Methods Our hospital patients with gastrointestinal stromal tumor as the research object, 42 cases of patients were retrospectively analyzed the clinical data and imaging diagnosis information, and comparing the imaging findings and pathologic diagnosis of patients. Results 42 cases patients were confirmed by surgery and pathology of gastrointestinal stromal tumor, including gastric stromal tumor, small intestinal stromal tumor, colon stromal tumor and there were 14 cases of rectal stromal tumor, 18 cases, 6 cases and 4 cases; Tumor between 2.5 cm to 20 cm in diameter, the average diameter was (13.7±2.3) cm, tumor shape: round or class round 15 cases, 27 cases of irregular points leaf form. Benign and malignant gastrointestinal stromal tumor of gastrointestinal stromal tumor in 14 cases and 28 cases respectively. By CT examination, benign tumors in patients with tumors are under 5 cm in diameter, and the density of tumor even, not seen significant calcification. Malignant tumor patients in more than 5 cm in diameter, tumors had uneven density, and shape is irregular, bleeding from low density area in the center of the tumor, is no clear boundary between between edge and the surrounding tissue, the enhancement scanning visible edge has obvious strength phenomenon, but the center did not see. Some patients exist lymph node metastasis or spread to the lier, involving the mesentery. Conclusion Patients with gastrointestinal stromal tumor by CT examination, to tumor size, shape, edge, coated and reinforcement degree, growth mode and the degree of necrosis was more clear visual observation, and according to its main clinical manifestation to identification of benign and malignant tumor, especially tumor size and fission number is an important basis of judging malignant, clinical diagnosis, differential and treatment of patients is of great significance.