Classification of enlarged prostatic utricle in patients with hypospadias.

An enlarged prostatic utricle is often associated with hypospadias. To evaluate the relationship between the incidence of prostatic utricle and the degree of hypospadias, we performed retrograde urethrography and/or micturating cystourethrography on 280 patients with hypospadias. Prostatic utricles were demonstrated in 84 patients (27.5%) and the incidence increased according to the severity of hypospadias. The prostatic utricles were classified into four types from the standpoint of size and location of the opening of the utricle, and a direct relationship was demonstrated between the severity of hypospadias and increasing size of the prostatic utricle.