Definition: chronic inflammatory disease of the pilosebaceous apparatus marked by an increase in sebum secretions causing lesions most frequently occurring on the face, chest, and back; the inflamed glands may form small pink papules, which sometimes surround comedones so that they have black centers (blackheads), or form pustules or cysts (whiteheads).
Synonyms (terms occurring on more labels are shown first): Acne, acnes
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