A premalignant warty lesion occurring on the sun-exposed skin of the face or hands in aged light-skinned people.
A tumor that does not form metastases, and does not invade and destroy adjacent normal tissue.
A melanocytic nevus that is visible at birth, is often larger than an acquired nevus.
Acute or chronic dermatitis caused caused by initial irritant effect of a substance that comes in contact with the skin.
Removal of foreign materials, necrotic matter, and devitalized tissue from a wound or burn.
Focal ischemic necrosis of skin and underlying tissues at sites of constant pressure or recurring friction.
Procedure used to remove acne scars or pits, performed with sandpaper or other abrasive materials.
A slowly-growing, benign skin nodule consisting of poorly demarcated cellular fibrous tissue.
A physician who specializes in diagnosing and treating cutaneous and related systemic diseases.
Cutaneous pigmented lesions with notched, irregular borders, considered pre-malignant.
A thick, crusty covering or slough that develops after thermal or chemical burn or cauterization of the skin.
A nevus in which nests of melanocytes are found in the dermis, but not at the epidermal-dermal junction.
Pathologic death of one or more cells, or of a portion of tissue or organ, resulting from irreversible damage.
A circumscribed malformation of the skin, especially one that is colored by hyperpigmentation.
A common inherited condition characterized by the eruption of reddish, silvery-scaled maculopapules.