What of the following is truea) Viral warts spontaneously resolveb) Plantar warts should not be excisedc) Callosity are formed occupationallyd) Corns are viral in etiology

Warts Warts are epidermal growths associated with human papilloma virus (HPV) infection. Histologically they are characterized by - hyperkeratosis (hypertrophy of the horny layer) - acanthosis (hypertrophy of the spinous layer) - papillomatosis -  Koilocytes (large keratinocytes with eccenteric nuclei) are seen Different morphologic types of warts occur on different parts of body. Verruca vulgaris (or common wart) - fingers and toes Verruca plantaris (plantar warts) - soles & palms Verruca plana (flat warts) - face, legs & hands Condylomata acuminata (veneral warts) - moist areas around the vulva, arms & scrotum Treatment-  - warts can be removed by a number of chemicals, including formalin, podophyllum etc. - surgical excision or curettage with electrodessication can also be used. - treatment of extensive areas of skin requires surgical excision under general anaesthesia. Recurrences are common Some warts are risk factors for squamous cell carcinoma Corns & Callosities Corns and callosities both are hyperkeratosis due to chronic excessive pressure or friction on the skin (for eg. callosities on the hands of gardeners and labourers)