Abstract
A 1-year-old boy, an 8-month-old girl, and a 3-yearold girl with a prepubic abscess or mass were admitted to our hospital. Fistulography and magnetic resonance imaging (MRI) revealed a fistulous tract extending toward the bladder, urachus, and perineal skin, respectively. The fistula was removed in all cases. A congenital prepubic sinus (CPS) exhibits various anatomical characteristics. It was reported that a CPS can onginate from the primitive urogenital sinus, and it can be categorized into 3 subtypes: the high type extends toward the urachal remnant; the middle type, toward the bladder; and the low type, toward the urethra. Of 43 CPS cases reported in the literature, 22 cases exhibited a middle-type fistula. An MRI was useful to detect the fistulas.
