胰腺实性-假乳头状瘤的CT诊断

目的:分析胰腺实性-假乳头状瘤的CT表现,探讨CT对该肿瘤的诊断价值。方法:回顾分析经手术病理证实的13例胰腺实性-假乳头状瘤的CT表现,观察病变形态、密度、边界、周围结构及强化方式。结果:肿瘤多呈圆形、椭圆形,多有完整包膜,与胰腺分界清晰,一般不伴有胆总管和胰管扩张。肿瘤内有实性和囊性结构,囊实性结构比例相仿的肿瘤占全部病例的63.6%,囊性结构为主者占全部病例的27.3%,实性结构为主的肿瘤占全部病例的9.1%;CT平扫实性部分呈低或等密度,增强动脉期呈轻度强化,门静脉期中度强化;囊性部分呈低密度,无强化。结论:胰腺实性-假乳头状瘤CT表现有一定特征,CT检查对其诊断与鉴别诊断具有重要价值。

CT diagnosis of slid-pseudopillary tmors of the pncreas

Objective:To study the CT manifestations of the solid-pseudopapillary tumors of pancreas(SPTP) and to explore the CT diagnostic value.Methods:CT features of eleven patients with pathologically proved SPTP were retrospectively analyzed.Results:① There were solid and cystic structures within the neoplasm.The solid portions were demonstrated hypo-oriso-attenuation on pre-contrast CT.Slight enhancement was shown in the arterial phase and marked enhancement in the portal venous phase on post-contrast CT scan.The cystic portions appeared hypo-attenuation on both pre-and post-contras tviews;② 7 tumors were composed of similar proportions of solid and cystic parts,and 3 tumors were mainly composed of cystic parts.Their CT findings were solid and cystic alternative distributions,and cystic portions with mural nodules,respectively;③ The predominant solid tumor was found in 1 case with cystic portions under the capsule;④ Most tumors occurred in the pancreas,presenting as round or oval in shape,and were completely encapsulated and marked enhanced with well-defined margins on post-contrast images;⑤ There was no associated dilation of the common bile duct or pancreatic duct;and ⑥ 8 tumors were diagnosed as benign and 3 as low-grade malignant preoperatively.Conclusion:The CT characteristic findings might be of great value in dignosis and differential dignosis of SPTP.