胰腺黏液性囊性肿瘤的CT、MR诊断

目的分析胰腺黏液性囊性肿瘤（MCN）的CT及MR影像特点。方法18例胰腺黏液性囊性肿瘤均经病理证实，其中囊腺瘤11例，交界性肿瘤4例，囊腺癌3例。患者均进行了CT和（或）MR检查,回顾性分析肿瘤的CT及MR影像表现。结果胰腺黏液性囊性肿瘤平均大小为6．7cm，11例位于胰体、尾：除2例囊腺瘤为单房性无间隔外，其余16例均为多房性。3例囊腺癌囊壁及间隔明显增厚或囊壁上见壁结节，其中2例的囊腔直径大于2．0cm；13例非恶性肿瘤的囊壁及小房间隔较薄且均匀，无壁结节，小房直径大于2．0cm。1例囊壁钙化，4例合并胰腺炎改变，1例合并有胆总管扩张，1例周围血管包绕。结论胰腺黏液性囊性肿瘤的CT及MR表现具有一定的特点，有助于黏液性囊性肿瘤的诊断及鉴别诊断。

CT and MR findings in mucinous cystic neoplasms of the pancreas

Objective To analyze the CT and MR imaging features of mucinous cystic neoplasms (MCN) of the pancreas. Methods Eighteen cases of MCNs were proved pathologically, including 11 cases of cystadenoma, 4 cases of borderline cystic neoplasms and 3 cases of cystadenocarcinoma. All pati- ents were performed with CT and/or MR scans, and the imaging findings were retrospectively evaluated. Results The mean tumour sizes of MCNs were 6.7 cm. Eleven cases were found in the body or tail of the pancreas. Except 2 cases of unilocular cystadenoma without septa, the remaining 16 cases of MCNs were multilocular. Three cases of cystadenocarcinoma revealed thick peripheral wall and septa or mural nodules, and 2 of these 3 cases show cystic cavities measuring more than 2.0 cm in size. Thirteen cases (benign or borderline) revealed thin peripheral wall and internal septa with cystic cavities measuring more than 2.0 cm in size, without mural nodules. One case with peripheral wall calcification, 4 cases with pancreatitis, 1 case with common bile duct dilatation and 1 case with vascular encasement were detected in 18 cases of MCNs. Conclusion The imaging characteristics of MCNs may be helpful in differentiating these lesions from other cystic masses, and CT/MR can be useful for the diagnosis of MCNs.