title: Mountainbiker's hematuria: a case report.
abstract: Although exercise-induced hematuria is a well known finding in long distance running, it is extremely rare in cycling. We describe a case of gross atraumatic hematuria after mountainbiking. The only pathologic finding in our patient was a small hyperemic zone in the bladder mucosa suggesting a local traumatic origin due to repeated contact of the flaccid bladder wall against the bladder base. This in contrast with the renal origin commonly seen in marathon runners. It is a benign hematuria that usually resolves within a day without specific treatment. The best treatment is prevention by means of good bladder filling. Neoplasm of the urothelium should be ruled out in differential diagnosis.
authors.affiliation: Department of Emergency Medicine, AZ KLINA, Brasschaat, Belgium.
authors.forename: Maarten
authors.initials: M
authors.lastname: Albersen
authors.forename: Luc J M
authors.initials: LJ
authors.lastname: Mortelmans
authors.forename: Joost A
authors.initials: JA
authors.lastname: Baert
mesh_terms: D000328:Adult; D001642:Bicycling; D006417:Hematuria / Q000175:diagnosis / Q000209:etiology*; D006801:Humans; D008297:Male; D014463:Ultrasonography; D001743:Urinary Bladder / Q000000981:diagnostic imaging / Q000293:injuries*; D014567:Urography