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目的：观察小肠平滑肌肿瘤血管形态。方法：对８例正常小肠标本及１０例（１５个瘤体）经病理证实的平滑肌瘤手术切除标本，采用血管造影、解剖镜观察、石蜡切片光镜观察及图像分析。结果：小肠平滑肌肿瘤血管丰富，共同特征是：供血动脉增粗，沿瘤蒂进入瘤中心，呈放射状分布、簇状增生、丰富吻合，形似“蜘蛛网”状。血管扭曲、中断，瘤体内造影剂池明显者提示平滑肌肉瘤。结论：小肠平滑肌肿瘤属多血供肿瘤，良、恶性之间血管存在一定特点。这有助于介入诊断及螺旋ＣＴ诊断。
Objective: To observe the vascular morphology of intestinal smooth muscle tumors. METHODS: Eight cases of normal small intestine and 10 cases (15 tumors) of pathologically confirmed leiomyomas were surgically resected. The angiograms, dissections, paraffin sections, light microscopy, and image analysis were performed. Results: Intestinal smooth muscle tumors are rich in blood vessels. The common feature is that the blood supply arteries are thickened and enter the center of the tumor along the tumor pedicles. They are radially distributed, cluster-like hyperplasia, and are richly anastomosed, resembling a “spider web” shape. The blood vessels are distorted and interrupted. Obviously, the contrast pool in the tumor is suggestive of leiomyosarcoma. Conclusion: The small intestine smooth muscle tumor is a kind of blood supply tumor. The blood vessels between benign and malignant have certain characteristics. This helps in interventional diagnosis and spiral CT diagnosis.