直肠神经内分泌肿瘤的CT诊断  

Diagnosis of rectal neuroendocrine tumor using CT

作　　者：朱文丰[1] 代海洋[1] 黎昕[1] 钟华[1] 曾裕镜[1] 蓝博文[1] 

机构地区：[1]惠州市中心人民医院放射科,广东516001

出　　处：《国际放射医学核医学杂志》2015年第3期220-223,共4页International Journal of Radiation Medicine and Nuclear Medicine

摘　　要：目的：探讨直肠神经内分泌肿瘤（RNET）的CT影像学表现特征及诊断要点。方法回顾性分析21例经内镜活检或手术后病理证实的RNET患者的临床及CT影像学资料，总结其诊断及鉴别要点。结果在21例RNET患者中，典型类癌为8例、不典型类癌为3例、低分化神经内分泌癌/小细胞癌为10例。CT平扫显示病灶呈结节状软组织密度影突向直肠肠腔内，边界清晰，密度均匀，增强后动脉期明显强化，门脉期强化程度略减低。其中，18例患者的病灶突破直肠浆膜侵犯周围脂肪组织；16例患者出现直肠周围淋巴结转移；2例患者出现肝脏转移。结论 RNET的CT影像学表现具有一定的特异度，但最终诊断仍需根据临床病理及免疫组化的结果来确定。Objective To investigate CT imaging features of rectal neuroendocrine tumor （RNET） and identify its diagnostic features. Methods CT imaging data of 21 RNET cases confirmed by endoscopy or surgical pathology were retrospectively analyzed. Results Of the 21 cases, 8 were typical carcinoid, 3 were atypical carcinoid, and 10 were poorly differentiated neuroendocrine/small cell carcinoma. The lesions in the lumen were soft nodular-like tissue on plain CT with clear margin and homogeneous density. Enhancement rendered the arterial phase evident and the venous phase moderately visible. A total of 18 cases showed growth in the serous membrane and invasion in the fat around the rectum, 16 cases showed lymph node metastasis around the rectum, and 2 cases exhibited liver metastasis. Conclusions A number of CT imaging features specifically characterized neuroendocrine tumors;however, definitive diagnosis still relies on pathological diagnosis.

关 键 词：直肠 神经内分泌瘤 体层摄影术 X线计算机 

分 类 号：R730.44[医药卫生—肿瘤] R735.37[医药卫生—临床医学]