Sebaceous hyperplasia and adenoma. Clear cell acanthoma and dermatofibroma

Sebaceous hyperplasia (SH) is a common, benign condition of sebaceous glands in adults of middle age or older. Lesions can be single or multiple and manifest as yellowish, soft, small papules on the face (particularly nose, cheeks, and forehead). SH occasionally also occurs on the chest, areola, mouth, scrotum, foreskin, shaft of penis, and vulva. Lesions of SH are benign, with no known potential for malignant transformation, but may be associated with nonmelanoma skin cancer in transplantation patients.