Acne necroticans
Last Updated: 2020-06-15
ICD11: ED81.Y
Last Updated: 2020-06-15
Author(s): Anzengruber F., Navarini A.
ICD11: ED81.Y
Baum 1910.
Acne varioliformis, acne frontalis, acne atrophica, necrotizing lymphocytic folliculitis.
Rare, necrotizing, acne-like inflammation of the hair follicles not related to acne vulgaris. It is a special form of pyoderma or folliculitis decalvans.
Itchy, reddish papules and pustules that become necrotic in the course of disease, and leave a varioliform scar after the scab has fallen off. No comedones are present.
Coagulase-negative staphylococci are detectable by swabs, but are not always present.
Very rare and disputed disease – be reluctant with making this diagnosis without solid evidence, and make sure you compare your case with peer-reviewed case reports.
Hair attachment zone.
Initially lymphocytic infiltrate, which in the course of time organizes itself into an intrafollicular granulocytic abscess. In addition, necrosis of the infundibular epithelia may occur.
Frequent relapse.
The initial treatment is both systemic and topical. Even after discontinuation of systemic therapy, external antiseptic therapy must be continued for a long period to prevent recurrences.
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