Urethral stricture abnormal urethra morphology urethra stricture urethra stenosis urethral constriction MP:0003592 abnormal narrowing or constriction at one or more points in the urethra Urethral stricture is almost invariably restricted to males and often secondary to injury, inflammation, tumors or any other cause of scarring; whether congenital or acquired, urethral strictures may compromise voiding and cause incontinence, bleeding, stones or even renal failure. MPheno.ontology urethral stricture constricted urethra