Congenital malalignment of the great toenails.

Congenital malalignment of the great toenails is a disorder in which malalignment of the nail matrix results in angular lateral nail plate growth. The consequence is onychodystrophy, which may progress to onychogryphosis and chronic ingrown toenails. There has been debate as to whether the condition is inherited or acquired in utero secondary to improper fetal positioning. A 6-year-old boy and his father, both of whom have this disorder, are discussed.