title: MR imaging of the retrorectal-presacral tumors: an algorithmic approach.
abstract: The retrorectal-presacral space is located posterior to the mesorectum and anterior to the sacrum, and can harbor a heterogeneous group of uncommon masses. Retrorectal-presacral tumors may be classified as congenital, neurogenic, osseous, and miscellaneous. Magnetic resonance imaging (MRI) plays a crucial role in directing appropriate management through accurate diagnosis, detection of complications and anatomic extent. MRI aids in the selection of optimal surgical approach such as anterior, posterior, or combined-based on the lesion extent and relationship to adjacent structures. This article reviews the anatomy of the retrorectal-presacral space and the related tumors, optimal MRI protocol, MRI-based approach to differential diagnosis, and finally pertinent reporting pointers and implications of MR imaging findings for surgical management.
authors: Joint Department of Medical Imaging (JDMI), University Health Network, Toronto, ON, Canada. hooman.hosseini-nik@uhn.ca.
authors: Hooman
authors: H
authors: Hosseini-Nik
authors: Department of Radiology, Wake Forest University School of Medicine, One Medical Center Boulevard, Winston-Salem, NC, 27157, USA. khossein@wakehealth.edu.
authors: Keyanoosh
authors: K
authors: Hosseinzadeh
authors: Department of Medical Imaging, University of Toronto, Toronto, ON, Canada. rajb29@gmail.com.
authors: Rajesh
authors: R
authors: Bhayana
authors: Joint Department of Medical Imaging (JDMI), University Health Network, Toronto, ON, Canada. kartik.jhaveri@uhn.ca.|Department of Medical Imaging, University of Toronto, Toronto, ON, Canada. kartik.jhaveri@uhn.ca.
authors: Kartik S
authors: KS
authors: Jhaveri
mesh_terms: D000465:Algorithms; D003287:Contrast Media; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007089:Image Enhancement; D021621:Imaging, Three-Dimensional; D008279:Magnetic Resonance Imaging; D008297:Male; D010386:Pelvic Neoplasms / Q000473:pathology*; D012007:Rectum / Q000473:pathology; D012445:Sacrococcygeal Region / Q000473:pathology
chemical_list: D003287:Contrast Media
keywords: Benign tumor; Magnetic resonance imaging; Malignant tumor; Neoplasm; Presacral space; Retrorectal space