The mild end of the clinical spectrum of posterior urethral valves.

Posterior urethral valves have a broad clinical spectrum. In this series of 87 patients, 36 had mild valvular obstruction, the most common clinical variety. Boys with mild valves had a greater frequency of diurnal and nocturnal enuresis, super-imposed infection, and a poor stream. The diagnosis was established by a very strict correlation of the radiological and endoscopic findings. Urodynamic studies, although performed in a limited number of patients, add validity to the diagnosis of mild valves. A classification based on the secondary anatomical changes and functional damage, which divides the valves in mild, moderate, and severe is recommended. Results of the endoscopic fulguration were excellent and without complications; 34 of 36 patients were improved or cured of their disturbing symptoms.