title: Acute urine retention in a child due to fibromatosis of the prostate.
abstract: The authors describe an 11-month-old boy with acute urine retention due to fibromatosis. Cystoscopic examination revealed no abnormalities in the bladder but intraurethrally there was an impression of the lobi prostate. Repeated transurethral and transperineal biopsies showed proliferation of randomly arranged spindle cells in a loose collagenous matrix. Mitotic figures were scarce. Fibrous proliferations of the prostate and bladder are rare. The fibromatoses constitute a group of nonmetastasizing fibrous growths which tend to invade surrounding tissues. They show a wide range in histological appearance and biological behavior, varying from spontaneous regression to aggressive and destructive local growth. As in our case the histopathological diagnosis was fibromatosis without any further specification, it was impossible to predict the behavior of the process. For this reason, a wait-and-see policy was adopted: after a very short period of time, the tumor regressed spontaneously.
authors.affiliation: Department of Pediatric Urology, Erasmus University Hospital, Rotterdam, The Netherlands.
authors.forename: R J
authors.initials: RJ
authors.lastname: Scholtmeijer
authors.forename: A M
authors.initials: AM
authors.lastname: van Unnik
authors.forename: F W
authors.initials: FW
authors.lastname: ten Kate
mesh_terms: D005350:Fibroma / Q000150:complications* / Q000473:pathology; D006801:Humans; D007223:Infant; D008297:Male; D009365:Neoplasm Regression, Spontaneous; D011467:Prostate / Q000473:pathology; D011471:Prostatic Neoplasms / Q000150:complications* / Q000473:pathology; D014555:Urination Disorders / Q000209:etiology*