| Deep rectosigmoid endometriosis: "mushroom cap" sign on T2-weighted MR imaging. | |
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MedLine Citation:
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PMID: 20820774 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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PURPOSE: The purpose of this study is to evaluate the "mushroom cap" sign on T2-weighted MR imaging in patients with submucosal tumors in the rectosigmoid colon. METHODS: From January 2001 to August 2009, 12 patients with four different diseases presenting or mimicking submucosal tumors in the rectosigmoid colon underwent colonic resection. All patients with deep endometriosis (n = 6), gastrointestinal stromal tumor (n = 4), metastasis from ovary cancer (n = 1), and carcinoid tumor (n = 1) had either an MRI of the rectum or pelvis before surgery. We evaluated the MRI findings and compared them with the macroscopic and microscopic observations in the resected specimens. RESULTS: In all six cases of deep endometriosis, a characteristic "mushroom cap" shaped appearance was found on T2-weighted MR imaging. Heterogeneous low signal intensity of the hypertrophic muscularis propria, covered with high signal intensity of the mucosa and submucosa on T2-weighted MR images, looked like a "mushroom cap" with the pattern of intraluminal endophytic growth. In histological findings, deep endometriosis involved the submucosa (n = 4) or mucosa (n = 2). The "mushroom cap" sign was not present in any of the six other tumors. CONCLUSION: The "mushroom cap" sign on T2-weighted MR imaging may be a characteristic sign for diagnosing deep rectosigmoid endometriosis. |
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Authors:
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Jung Hwan Yoon; Dongil Choi; Kee-Taek Jang; Chan Kyo Kim; Heejung Kim; Soon Jin Lee; Ho-Kyung Chun; Woo Yong Lee; Seong Hyeon Yun |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Abdominal imaging Volume: 35 ISSN: 1432-0509 ISO Abbreviation: Abdom Imaging Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-11-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9303672 Medline TA: Abdom Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 726-31 Citation Subset: IM |
Affiliation:
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Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Kangnam-Ku, Seoul, Korea. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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