胰腺转移瘤的MDCT表现及其特征分析  

MDCT findings and characteristics of metastatic pancreatic tumors

作　　者：饶圣祥[1] 曾蒙苏[1] 程伟中[1] 陈刚[1] 缪熙音[1] 纪元[2] 

机构地区：[1]复旦大学附属中山医院放射科,上海市影像医学研究所,复旦大学上海医学院影像医学系,上海200032 [2]复旦大学附属中山医院病理科

出　　处：《中华胰腺病杂志》2009年第4期235-237,共3页Chinese Journal of Pancreatology

摘　　要：目的描述胰腺转移瘤的螺旋CT平扫和动态增强的表现及其特征。方法收集23例胰腺转移瘤患者，分析胰腺转移瘤的大小、数量、部位、密度形态、强化特征以及继发征象（胆胰管有无扩张、血管有无包绕、远端胰腺有无萎缩）。结果23例胰腺转移瘤患者共发现肿瘤35枚，其中7例为多发癌灶，16例为单发转移。肿瘤最大径平均3．3cm，主要位于胰体尾。大部分病灶动脉期无明显强化（30枚），门脉期呈相对低密度（23枚）、等密度（4枚）或明显边缘强化（3枚）；5枚转移灶动脉期呈明显强化，门脉期呈持续强化。仅1例伴胰胆管扩张，2例伴胰管轻度扩张，1例包绕脾静脉。23例中13例伴有其他部位转移。结论胰腺转移瘤CT有一定的特征，熟悉其表现并结合病史能提高其诊断的准确性。Objective To evaluate MDCT findings and characteristics of metastatic pancreatic tumors. Methods A total of 23 cases with metastatic pancreatic tumors were collected and the CT findings including the size, number, location, density patterns, enhancement patterns and secondary signs （ dilatation of the pancreatic duct and/or bile duct, involvement of peripancreatic vessels, atrophy of distal pancreas ） were analyzed retrospectively. Results A total of 35 metastatic pancreatic tumors were identified in the 23 patients. Tumors were multiple in 7 patients, the other 16 patients had single metastatic pancreatic tumor. The mean maximum diameter of the tumors was 3.3 cm; the majority was located in the pancreatic body/tail. Thirty tumors demonstrated no enhancement in the arterial phase, and in the portal phase 23 tumors were hypodensive compared witb normal pancreatic tissue, 4 tumors were isodense and 3 tumors showed a peripheral rim of enhancement. Five tumors showed markedly enhancement in the arterial and portal phase. Only 1 patients had dilated biliary and pancreatic duct, and 2 patients had dilated pancreatic duct. Only 1 case demonstrated involvement of splenic vein. 13 of the 23 patients had extra-pancreatic metastasis. Conclusions Pancreatic metastasis showed certain imaging characteristics. The accuracy of CT diagnosis could be improved by understanding of these CT findings and clinical features.

关 键 词：胰腺肿瘤 肿瘤转移 体层摄影术 X线计算机 

分 类 号：R735.9[医药卫生—肿瘤]