A rare case of large, unusual, and mutilating verruca vulgaris with cutaneous horns treated with plastic surgery.

Cutaneous horn is a morphologic designation for a protuberant mass of keratin produced by unusual cohesiveness of keratinized material. We report a rare case of large, unusual, and mutilating verruca vulgaris with cutaneous horns in a 39-year-old male peasant. To our knowledge, this is the first case of the underlying phalangeal bones being largely demolished, resulting in serious mutilation. The patient was successfully treated with plastic surgery. Of note in this case is the bone absorption of the terminal phalanges and loss of hand function.