Authors: Yuki Himoto Aki Kido Koji Fujimoto Kenji Kawada Toshiyuki Kitai Yoshiharu Sakai Kaori Togashi
Publish Date: 2016/03/16
Volume: 41, Issue: 9, Pages: 1713-1717
Abstract
Pseudomyxoma peritonei PMP is a rare disease with neoplastic growth of mucinsecreting cells in the peritoneal cavity resulting in mucinous ascites The septum of intraabdominal fluid collection is a key imaging finding characteristic to PMP In magnetic resonance imaging MRI multib value diffusionweighted imaging DWI is a method used to obtain an accurate apparent diffusion coefficient The clinical utilities of DWI using lower b values as diagnostic imaging are rarely highlighted This report describes a case of PMP in which DWI using b values of 100 and 500 s/mm2 exclusively visualized many thick septa with low signal intensity in peritoneal effusion The septa could not be recognized in DWIs with b values of zero or 1000 s/mm2 as with ultrasonography computed tomography and conventional MRI A discrepancy between DWI using lower b values and other MRI sequences or imaging modalities indicates a specific capability of DWI using low b values the ability to visualize septa of intraabdominal fluid collection much thicker than in real cases Results for this case suggest that DWI using low b values might present clinical potential for the preoperative diagnosis of PMP
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