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目的研究胃肠道神经鞘瘤的螺旋 CT 表现,提高对该病的认识诊断能力。方法回顾性分析12例经手术病理证实的胃肠道神经鞘瘤的资料,分析其临床及螺旋 CT 表现。评估内容包括肿瘤的部位、大小、形态、边缘、生长方式、增强模式、增强程度、肿瘤被覆黏膜面溃疡情况。结果平扫所有肿块均位于胃肠道壁内,密度略低于肌肉。6例向腔外生长,3例向腔内生长,3例同时向腔内外生长。10例肿瘤呈圆形、卵圆形或扁圆形,边界清晰;2例略呈分叶状,边缘不清。3例可见肿瘤部位胃肠道黏膜面有浅小溃疡形成。增强扫描,所有肿瘤均呈匀质实性肿块;10例动脉期无明显强化,门静脉期呈中度强化;2例动脉期轻度强化,而门静脉期明显强化。结论胃肠道神经鞘瘤 CT 表现具有一定特征性,CT 上多表现为圆形、卵圆形或扁圆形的匀质实性肿块,边缘清晰,缓慢且均匀中度强化。
Objective To study the spiral CT findings of gastrointestinal schwannoma and to improve the diagnostic ability of the disease. Methods Retrospective analysis of 12 cases of gastrointestinal schwannoma confirmed by surgery and pathology data, analysis of clinical and spiral CT findings. The assessment included tumor location, size, morphology, margins, growth patterns, enhancement patterns, enhancement, and tumor-covered mucosal ulcers. Results All tumors were located in the gastrointestinal tract, the density of slightly lower than the muscle. 6 cases grew out of the cavity, 3 cases grew into the cavity, and 3 cases grew into the cavity at the same time. Ten cases of tumors were round, oval or oblate, clear boundary; 2 cases slightly lobulated, margin unclear. 3 cases of visible tumor site gastrointestinal mucosal surface of a small ulcer formation. All the tumors showed homogeneous and solid lumps. Ten cases had no arterial phase enhancement and moderate portal vein phase. Two cases had mild arterial phase enhancement and portal vein phase enhancement. Conclusions CT manifestations of gastrointestinal schwannoma have some characteristic features. CT is characterized by a round, oval or oblate round solid mass with clear, slow and even moderate enhancement.