Overview
Acne necrotica miliaris, also known as necrotizing lymphocytic folliculitis, is a chronic inflammatory skin condition characterized by recurrent crops of small, umbilicated papules that rapidly necrose, often leading to scarring. It predominantly affects adults and lacks a clear etiology 1.Diagnosis
Key Clinical Features: Recurrent inflammatory papulonodules, often umbilicated and erythematous, typically 1-2 mm in size 1.
Histopathology: Early lesions show necrotising lymphocytic folliculitis with lymphocytic inflammation around follicles evolving to necrosis 15.
Differential Diagnosis: Distinguish from other acneiform eruptions like acne vulgaris, folliculitis, and drug-induced acneiform eruptions based on clinical presentation and histopathology 24.
Importance of Primary Lesions: Recognition of early umbilicated papules is crucial for accurate diagnosis 1.Management
First-Line Treatments: Topical corticosteroids and antimicrobials (e.g., clindamycin) to reduce inflammation and prevent secondary infection 1.
Adjunctive Treatments: Systemic antibiotics (e.g., doxycycline) for more severe cases 1.
Avoidance of Irritants: Minimize skin irritation and trauma to affected areas to prevent exacerbation 1.Special Populations
No Specific Guidelines: Limited evidence regarding management in pregnancy, pediatrics, or elderly populations 134.Key Recommendations
Recognize and biopsy early umbilicated papules for definitive diagnosis (Evidence: Moderate 15).
Utilize topical corticosteroids and antimicrobials as initial therapy to manage inflammation and prevent scarring (Evidence: Expert opinion 1).
Consider systemic antibiotics for refractory cases to control severe inflammatory outbreaks (Evidence: Expert opinion 1).References
1 Pitney LK, O'Brien B, Pitney MJ. Acne necrotica (necrotizing lymphocytic folliculitis): An enigmatic and under-recognised dermatosis. The Australasian journal of dermatology 2018. link
2 Momin SB, Peterson A, Del Rosso JQ. A status report on drug-associated acne and acneiform eruptions. Journal of drugs in dermatology : JDD 2010. link
3 Cheung MJ, Taher M, Lauzon GJ. Acneiform facial eruptions: a problem for young women. Canadian family physician Medecin de famille canadien 2005. link
4 Plewig G, Jansen T. Acneiform dermatoses. Dermatology (Basel, Switzerland) 1998. link
5 Kossard S, Collins A, McCrossin I. Necrotizing lymphocytic folliculitis: the early lesion of acne necrotica (varioliformis). Journal of the American Academy of Dermatology 1987. link80408-5)