目的　探讨胃肠道淋巴瘤的CT平扫和增强表现。方法　回顾性分析 2 5例经胃镜活检 (8例 )、肠镜 (3例 )、手术 (5例 )或颈部淋巴结穿刺活检 (9例 )证实的胃肠道淋巴瘤的CT平扫和增强资料。结果　 1例原发性胃淋巴瘤发生于贲门 ,余均为继发性。胃淋巴瘤CT表现可分为 3类 :(1)弥漫浸润或多发型 9例 (69.2 % ) ;(2 )节段型 3例 (2 3 .1% ) ;(3 )息肉型 1例 (7.7% ) ,胃镜结果阴性。平扫除 1例高度肥厚的胃壁其中可见略低密度灶 ,余密度多较均匀 ,除去中心坏死区 ,肿瘤实体CT值范围 2 0～ 42HU ,平均 3 1.3HU ;增强后多为均匀强化 ,强化幅度 15～ 3 3HU ,平均 2 3 .5HU。肠道淋巴瘤的CT表现分为 4类 :(1)多发结节型 4例 (2 6.7% ) ;(2 )壁内浸润型 5例 (3 3 .3 % ) ;(3 )肠系膜受累伴腔外肿块型 3例 (2 0 .0 % ) ;(4 )肿块型 3例 (2 0 .0 % )。结论　胃肠道淋巴瘤在CT上有轻到中度强化 ,后者对其有较高诊断价值 Objective To investigate the CT scan and enhancement of gastrointestinal lymphoma. Methods The CT scan and enhancement of 25 cases of gastrointestinal lymphoma confirmed by gastroscope biopsy (8 cases), colonoscopy (3 cases), operation (5 cases) or cervical lymph node biopsy (9 cases) were retrospectively analyzed. data. Results One case of primary gastric lymphoma occurred in the cardia and the rest were secondary. CT findings of gastric lymphoma can be divided into three categories: (1) diffuse infiltration or multiple type in 9 cases (69.2%); (2) segmental type in 3 cases (21.3%); (3) polyp type in 1 case 7.7%), endoscopy results were negative. One case of highly hypertrophic gastric lesions was observed in the lesser density of the lesion, the density was more uniform, except for the necrotic area, the CT value of the tumor ranged from 20 HU to 42 HU, an average of 3 1.3HU. After enhancement, most of them were uniform and intensified 15 ~ 3 3HU, an average of 23.5HU. Intestinal lymphoma CT manifestations are divided into four categories: (1) multiple nodular in 4 cases (2 6.7%); (2) intramural infiltration in 5 cases (33.3%); (3) mesenteric involvement Extracavitary mass type in 3 cases (20.0%); (4) Mass type in 3 cases (20.0%). Conclusions Gastrointestinal lymphoma has mild to moderate enhancement on CT, which has high diagnostic value