Biliary cystic intraductal papillary mucinous tumor and cystadenoma/cystadenocarcinoma: differentiation by CT
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To identify differential findings of biliary cystic intraductal papillary mucinous tumor (IPMT) and biliary cystadenoma/cystadenocarcinoma on CT images.
Materials and methods
Records of 7 patients with biliary cystic IPMT and 17 patients with biliary cystadenoma/cystadenocarcinoma were accessed. A pathologist reviewed gross morphologic and microscopic findings and confirmed the diagnosis. Two radiologists who were blind to the pathologic diagnosis reviewed CT images regarding size of cystic mass, mural nodule, septa, calcification, dilatation of the proximal, and distal bile ducts to the tumor, and the results were analyzed using multivariate analysis.
Mural nodule and dilatation of the bile ducts distal to the cystic tumor were more commonly seen in patients with cystic IPMT than in patients with biliary cystadenoma/cystadenocarcinoma and these are statistically significant, the P values being 0.029 and 0.016, respectively. Size of the cystic tumor, presence of septa, calcification, and dilatation of the bile duct proximal to the cystic tumor were not statistically different.
Biliary cystic IPMT could be differentiated from biliary cystadenoma/cystadenocarcinoma on CT images based on the presence of mural nodules and dilatation of the bile ducts distal to the cystic tumor.
KeywordsBile ducts Cysts CT MR Neoplasms Stenosis or obstruction US
Authors wish to thank Dr. John Roberts for his editorial assistance and Young Joo Moon for her assistance in manuscript preparation.
- 9.Nakanuma Y, Sasaki M, Ishikawa A, Tsui W, Chen TC, Huang SF (2002) Biliary papillary neoplasm of the liver. Histol Histopathol 27:851–861Google Scholar
- 16.Kosumahl M, Pauser U, Peters K, et al. (2004) Cystic neoplasms of the pancreas and tumor-like lesions with cystic features: a review of 418 cases and a classification proposal. Virchow Arch 445:168–178Google Scholar