A rare case of large, unusual, and mutilating verruca vulgaris with cutaneous horns treated with plastic surgery.Cutis. 2007 Aug;80 (2):145-8.

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.

Inflammatory changes in verruca vulgaris.J Cutan Pathol. 1980 Aug;7(4):217-21.

Forty-one (8%) of 500 randomly selected biopsy specimens in verruca vulgaris showed evidence of inflammation. The inflammation was lymphocytic and lichenoid in 21 specimens and was associated with papillary hemorrhage and infarction in 23. Clinical review indicated that patients of all ages were represented but that there was a predominance of verrucae of the extremities in older patients. The data suggest the possibility of a distinct solitary acral verruca in the elderly.