[Perineal groove--an undiagnosed malformation?].

Perineal groove is a congenital malformation characterized by a red and wet groove in the perineum between the fourchette and the anus. It has been considered a rare malformation. We managed three patients with a perineal groove from July 1 2002 to July 1 2003. During that period we encountered approximately 10 other new patients with various anorectal malformations. This indicates that perineal groove probably is a more common anomaly than previously reported. The anomaly requires no treatment. However, in one of our cases an associated anomaly of the urinary tract was found. We find it indicated to do an ultrasound of the urinary tract in patients with perineal groove.