Perianal Hailey-Hailey disease: an unusual differential diagnosis of condylomata acuminata.

We describe a 25-year-old woman with multiple papules in the perianal and perineal area, clinically resembling condylomata acuminata. The histology revealed an acantholytic epidermis and focal parakeratosis. The lesions were diagnosed as Hailey-Hailey disease localized in the perianal areal and need to be distinguished from human papillomavirus-associated genital lesions.