Posterocentral Compartment (Rectum)
This paper discusses the radiologic assessment of rectal endometriosis, emphasizing MRI's role in surgical planning and the critical imaging factors for accurate diagnosis and management.
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This chapter addresses how to image and assess rectal endometriosis, focusing on radiology workflows for detection and detailed mapping of rectal involvement. It synthesizes existing evidence and expert guidance on imaging methods (transvaginal ultrasonography as first-line for initial diagnosis and MRI as the preferred comprehensive modality), outlining key lesion descriptors such as location, distance from the anal verge, size, depth, circumferential extent, lesion count, and associated deep endometriotic lesions to support surgical planning and informed consent. A caveat is that imaging interpretation and selection of operative technique depend on accurate assessment of these features, and the chapter discusses multidisciplinary risk–benefit balancing rather than reporting new comparative outcomes. This paper is centrally about endometriosis — specifically rectal endometriosis within a compartment-based imaging framework for predicting extent and surgical involvement.
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