Classification systems for anterior urethral stricture disease in men: a systematic review.

Several classification systems have been proposed for AUSD. Each has its advantages and disadvantages. The urethral stricture score has been externally validated and shown to been predictive of surgical outcomes and recurrence. There are no scores that incorporate patient-related outcome measures (PROMs). Many classification systems have yet to provide sufficient external validation. Further external validation studies are needed before the general adoption of a particular system.