Squamous cell carcinoma complicating hidradenitis suppurativa.

A 67-year-old Caucasian man was referred to us with a 40-ycar history of multiple discharging sinuses involving the buttocks and groins. His skin condition had deteriorated markedly over the previous 12 months. Physical examination revealed an obese man of 95 kg with severe HS involving the buttocks, and perianal and perineal skin, extending onto the upper inner thighs and inguinal skin. There were multiple abscesses and suppurating, discharging sinuses as well as extensive scar tissue from healed lesions.