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. 2008 Jan 3;33(5):604–610. doi: 10.1007/s00261-007-9341-y

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© The Author(s) 2007

This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

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Fig. 1. — Poor anatomical detail on CT leading to overestimation of tumor invasion of the MRF in distal rectal tumors. A Axial MS-CT image of distal rectal cancer. The tumor (asterisk) is difficult to delineate and no fat pad can be seen between the tumor and the pelvic floor (arrow) suggesting invasion of the MRF. B Axial T2-weighted MR image at the same level shows a tumor free MRF represented by a partial intact muscular rectal wall layer (arrowhead) and a minimal fat pad (arrow) inbetween the tumor and the pelvic floor muscles (double arrow).