Sebaceous gland hyperplasia appear as small white or yellowish bumps (up to 3mm in diameter), they are usually found over the face and are especially common in middle-aged or elderly people with oily skin. If these lesions are unsightly they can be simply removed with laser vaporization or light electrosurgery, but may have a chance of coming back. While they are harmless and generally do not need treatment, some sebaceous gland hyperplasia lesions may mimic the appearance of a basal cell carcinoma (type of skin cancer) and in these cases a biopsy may be performed.
Of course, it is important to have any suspicious skin lesions checked by your dermatologist. Many of these benign lumps and bumps may mimic a skin cancer but can be easily checked and ruled out by a qualified specialist.