Magnetic resonance imaging and magnetic resonance cholangiopancreatography of intraductal papillary mucinous tumor of the pancreas

Chih Hui Lee, Kuang Tse Pan, Chein Fu Hung, Jeng Hwei Tseng*, Ta Sen Yeh, Nai Jen Liu

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

1 Scopus citations

Abstract

To demonstrate the features of intraductal papillary mucinous tumor (IPMT) of the pancreas on magnetic resonance imaging (MRI) and magnetic resonance cholangiopancreatography (MRCP) and to propose a guide for its optimal management based on the characteristic imaging findings. Sixteen patients with pathologically-proven IPMT are included in the study. All patients underwent MRI and MRCP. The imaging features were retrospectively reviewed and correlated with operative and pathological findings. Follow-up imaging was evaluated as well. MRCP depicted dilatation of the pancreatic duct of varying degree in all patients. Three types of IPMT were identified. Main duct IPMT (N=2) was characterized by marked dilatation of main pancreatic duct with diffuse intraductal papillary soft tissue tumors. Branch duct IPMT (N=8) was characterized by a cystic lesion with septa and soft tissue component and usually found in the uncinate process of pancreatic head. Combined type IPMT (N=6) has characteristics of both main duct type and branch duct type tumor. Among the 16 cases, two were benign adenomas, ten were malignant and four were dysplastic. Vessel invasion was found in one patient whereas regional lymph node metastasis was found in two patients. MRI is a good imaging modality to detect, diagnose and evaluate the extent of the advanced-stage IPMT. Most IPMTs are malignant and the pathological type is one of the most important prognostic factor. Once an IPMT is diagnosed, especially combined type tumor and those with large cystic lesions and marked dilated pancreatic duct, surgical intervention should be prompted. Small branch duct type IPMTs should be closely followed up if no intervention is performed.

Original languageEnglish
Pages (from-to)267-274
Number of pages8
JournalChinese Journal of Radiology
Volume31
Issue number6
StatePublished - 12 2006

Keywords

  • Intraductal Papillary Mucinous Tumor
  • Magnetic Resonance Cholangiopancreatography
  • Magnetic Resonance Imaging
  • Pancreas

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