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Retroportal main pancreatic duct with circumportal pancreas: radiographic visualization.
MedLine Citation:
PMID:  22040788     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
PURPOSE: The aim of this study was to investigate the imaging findings of retroportal main pancreatic duct (RMPD), a rare anomaly of the pancreas, and circumportal pancreas (CP) on computed tomography (CT) and magnetic resonance (MR) imaging. We also reviewed the previous literature and discussed its best imaging method, etiology and clinical importance.
METHODS: This work is a retrospective study. Two cases of RMPD were enrolled. The imaging findings of RMPD and CP were reviewed among the various CT and MR images obtained. Differences in visualization among the scans were evaluated using a four-stage model.
RESULTS: RMPD was always accompanied by CP. RMPD was detectable on contrast-enhanced CT but not on noncontrasted CT. RMPD was shown most clearly on arterial, portal and late phases of contrast-enhanced CT, contrast-enhanced fat-suppressed T1-weighted images and fat-suppressed T2-weighted images. CP was much easier to detect than RMPD and could be identified even on noncontrasted images.
CONCLUSIONS: We described the fourth and the fifth reported cases of RMPD. This is the first study to describe its MR imaging findings. CP was always present in cases of RMPD and was easily detectable on tomographic images. When radiologists or surgeons notice CP, it is necessary to pay attention to the course of the main pancreatic duct, particularly preoperatively to avoid surgical complications. It should be noted that these anomalies are undetectable on projection images.
Authors:
Wataru Gonoi; Masaaki Akahane; Hiroyuki Akai; Kazuchika Hagiwara; Shigeru Kiryu; Naoto Hayashi; Kuni Ohtomo
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Clinical imaging     Volume:  35     ISSN:  1873-4499     ISO Abbreviation:  Clin Imaging     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8911831     Medline TA:  Clin Imaging     Country:  United States    
Other Details:
Languages:  eng     Pagination:  442-6     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier Inc. All rights reserved.
Affiliation:
Department of Radiology, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan.
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