Papilloma Verrucae 2010-06-18T11:35:25Z Cause is a virus called HPV (human papilloma virus), which infects the skin and causes the abnormal growth. There are many different varieties of the virus, which usually depends on the location of the lesion. Warts, benign growths on the skin or mucous membranes that cause cosmetic problems as well as pain and discomfort. Warts most often occur on the hands, feet, and genital areas. SNOMEDCT_US:57019003 Warts UMLS:C3665596 SNOMEDCT_US:30285000 HP:0200043