| acne conglobata | Severe cystic acne, characterised by cystic lesion, abscesses, communicating sinuses, and thickened, nodular scars; usually sparing the face. (05 Mar 2000) |
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| acne cosmetica | Low-grade, non-inflammatory acne lesions from repeated application of comedogenic agents in cosmetics. (05 Mar 2000) |
| acne decalvans | A papular or pustular inflammation of the hair follicles of the scalp seen mostly in men, resulting in scarring and loss of hair in the affected area. Synonym: acne decalvans, alopecia follicularis. (05 Mar 2000) |
| acne erythematosa | acne rosacea |
| acne frontalis | A pyogenic infection involving follicles occurring chiefly on the forehead and temples; involution of the umbilicated and crusting lesions is followed by scar formation. Synonym: acne frontalis, acne necrotica. (05 Mar 2000) |
| acne fulminans | Severe scarring acne in teenaged males, which may be associated with fever, polyarthralgia, crusted ulcerative lesions, weight loss, and anaemia. Origin: fulmen, fulminis, thunder, lightning (05 Mar 2000) |
| acne generalis | Acne lesions involving the face, chest, and back. (05 Mar 2000) |
| acne hypertrophica | Acne vulgaris in which the lesions, on healing, leave hypertrophic scars. (05 Mar 2000) |
| acne indurata | Deeply seated acne, with large papules and pustules, large scars, and hypertrophic scars. (05 Mar 2000) |
| acne keloid | A type of acneiform disorder in which secondary pyogenic infection in and around pilosebaceous structures ends in keloidal scarring. It manifests as persistent folliculitis of the back of the neck associated with occlusion of the follicular orifices. It is most often encountered in black or asian men. (12 Dec 1998) |
| acne keratosa | An eruption of papules consisting of horny plugs projecting from the hair follicles, accompanied by inflammation. (05 Mar 2000) |
| acne medicamentosa | Acne caused or exacerbated by drugs, e.g., antiepileptic, halogens, steroids, tuberculostatic. (05 Mar 2000) |
| acne necrotica | A pyogenic infection involving follicles occurring chiefly on the forehead and temples; involution of the umbilicated and crusting lesions is followed by scar formation. Synonym: acne frontalis, acne necrotica. (05 Mar 2000) |
| acne neonatorum | A condition in newborn infants, characterised by papules and comedones on forehead and cheeks. (05 Mar 2000) |
| acne papulosa | Acne vulgaris in which the papular lesions predominate. (05 Mar 2000) |