caa a22 4500 605493103 CHVBK 20210128100519.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00261-015-0467-z doi (NATIONALLICENCE)springer-10.1007/s00261-015-0467-z Suburothelial and extrinsic lesions of the urinary bladder: radiologic and pathologic features with emphasis on MR imaging [Elektronische Daten] [Andrew Chung, Nicola Schieda, Trevor Flood, Ilias Cagiannos, Ania Kielar, Matthew McInnes, Evan Siegelman] Objective: The purpose of this article is to present a contemporary review of the imaging appearance of diseases which affect the deeper layers of the urinary bladder, including both suburothelial and extrinsic pathologies, using radiologic-pathologic correlation. Conclusion: Compared to the more common urothelial lesions, at cystoscopy, suburothelial and extrinsic diseases of the urinary bladder wall oftenhave a non-specific appearance or may be occult. Cross-sectional imaging, in particular MRI, plays an integral role in diagnosis. Mesenchymal tumors have distinct imaging features on MRI. Leiomyomas are characteristically low signal intensity on T2-weighted (T2W) imaging and progressively enhance. Lipomas and lipomatous hypertrophy are diagnosed by the presence of macroscopic fat. Neurofibromas, hemangiomas, and paragangliomas are hyperintense on T2W sequencesand hypervascular. Reactive lesions occur in the setting of chronic inflammation and include: nephrogenic adenoma, cystitis cystica, and cystitis glandularis. Imaging findings are commonly non-specific; however, a mass with internal cystic spaces in association with pelvic lipomatosis is suggestive ofcystitis glandularis. Urachal anomalies may be complicated by infection or malignancy. Urachal mucinous adenocarcinoma has a poor prognosis and may present as aT2-hyperintense suburothelial/extrinsic mass centered in the bladder dome. Other diseases may extrinsically involve the urinary bladder by hematogenous and peritoneal spread, including infection, endometriosis, and malignancy. A familiarity with suburothelial and extrinsic pathologies of the urinary bladder is critical for the radiologist, who may be the first to suggest these diagnoses. Springer Science+Business Media New York, 2015 Urinary bladder nationallicence Urothelium nationallicence Mesenchymal tumors nationallicence Urachal anomalies nationallicence Neoplasm nationallicence Chung Andrew Department of Medical Imaging, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut Schieda Nicola Department of Medical Imaging, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut Flood Trevor Department of Anatomical Pathology, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut Cagiannos Ilias Division of Urology, Department of Surgery, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut Kielar Ania Department of Medical Imaging, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut McInnes Matthew Department of Medical Imaging, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut Siegelman Evan Department of Radiology, The Hospital of the University of Pennsylvania, Philadelphia, PA, USA aut Abdominal Imaging Springer US; http://www.springer-ny.com 40/7(2015-10-01), 2573-2588 0942-8925 40:7<2573 2015 40 261 https://doi.org/10.1007/s00261-015-0467-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 review-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00261-015-0467-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chung Andrew Department of Medical Imaging, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut NATIONALLICENCE 700 1- Schieda Nicola Department of Medical Imaging, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut NATIONALLICENCE 700 1- Flood Trevor Department of Anatomical Pathology, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut NATIONALLICENCE 700 1- Cagiannos Ilias Division of Urology, Department of Surgery, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut NATIONALLICENCE 700 1- Kielar Ania Department of Medical Imaging, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut NATIONALLICENCE 700 1- McInnes Matthew Department of Medical Imaging, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada aut NATIONALLICENCE 700 1- Siegelman Evan Department of Radiology, The Hospital of the University of Pennsylvania, Philadelphia, PA, USA aut NATIONALLICENCE 773 0- Abdominal Imaging Springer US; http://www.springer-ny.com 40/7(2015-10-01), 2573-2588 0942-8925 40:7<2573 2015 40 261