title: Hypovitaminosis a of follicular duct as cause of acne vulgaris.
mesh_terms: D000152:Acne Vulgaris / Q000209:etiology*; D006197:Hair; D006801:Humans; D012629:Sebum / Q000378:metabolism; D012720:Severity of Illness Index; D014802:Vitamin A Deficiency / Q000150:complications*