目的探讨胰腺囊性肿瘤的CT和 MRI影像学表现及其鉴别诊断要点。方法 回顾性分析经手术病理证实的胰腺囊性肿 瘤44例。结果 ①黏液性囊腺瘤(MCN)17 例，位于胰腺体尾部11例，多表现为大 囊性病灶，边界清楚，部分可见壁结节 及分隔，平均直径约73.0mm，6例发生恶 变；②浆液性囊腺瘤(SCN)11例，年龄在 48～73岁，微囊型8例，其中5例表现为放 射状排列间隔，寡囊型2例，实性浆液性 囊腺瘤1例；③导管内乳头状瘤(IPMN)8 例，男性6例(75%)，平均年龄55岁，分支 胰管型5例，主胰管型3例，所有病灶均 与胰管相通，7例出现不同程度的胰管扩 张；④胰腺实性假乳头状瘤(SPN)8例，均 为女性，平均年龄29岁，均为囊实性病 变，其中5例病变有出血。结论 本文通过 分析胰腺囊性肿瘤CT和MRI影像特点及鉴 别要点，以提高该病的术前影像诊断。

Objective To investigate the CT and MRI imaging features of pancreatic cystic neoplasms. Methods All imaging date of 44 patients (pancreatic cystic neoplasms) confirmed by surgery and pathology were retrospective analyzed. Results ①Mucinous cystic neoplasms(MCN) 17 cases, 11 cases located in the body and tail of pancreatic, manifested clear boundaries, capsule visible wall nodules and partitions.MCN usually large volume, mean diameter 73.0mm.There are 6 cases of MCN were malignant. ②Serous cystic neoplasms(SCN) 11 cases.SCN were usualIy lobular with many smaIl cysts. Microcystadenomas in 8 cases, of which 5 cases showed radiating fibrous septation. 2 cases of Oligocystic cystadenomas, solid serous cystadenoma in 1 case. ③Intmductal papillary mucinous neoplasm(IPMN)8 cases, have 6 males and 2 females with an average age of 55 years, 3 of them were main-duct type and 5 of them were branch -type.All lesions were communicated with the pancreatic duct, and different degrees of pancreatic duct dilatation occurred in 7 cases. ④Solid pseudopapillary neoplasms(SPN) 8 cases, the average age of 29 years old,are all women and all cystic solid lesions and 5 of them bleeding. Conclusion This paper analyzes the CT and MRI features of pancreatic cystic tumors and their differential diagnosis, which was helpful to the preoperative diagnosis of pancreatic cystic tumors.