Acne necrotica

Source: Wikipedia, the free encyclopedia.
Acne necrotica
SpecialtyDermatology


Acne necrotica presents with a primary lesion that is a pruritic or painful erythematous follicular-based papule that develops central necrosis and crusting and heals with a varioliform scar.[1]: 650 [2]: 761 

Signs and symptoms

Usually appearing as a cluster of

pustules, the lesions are umbilicated, 2-4 mm in diameter, and develop central necrosis within a few days. An adherent hemorrhagic crust forms, but it falls off after 3–4 weeks, leaving varioliform scars.[3]

Causes

In essence, the etiology is unknown. Even though

Herpes simplex was found in some patients but not in others.[4]

Diagnosis

Propionibacterium acnes can be seen using Gram stain.[4]

Perifollicular lymphocyte infiltrates and lymphocytic spongiosis of the follicular epithelium are features of early lesions. Sebaceous glands, sebaceous ducts, and the infundibulum are all soon engulfed in sebaceous epithelium necrosis. There may be granulomas of foreign bodies. The epidermis may also necrotize. Both extensive corium necrosis and bleeding are major components. Neutrophils typically don't exist or appear later. Finally, fibrosis is visible.[5]

Treatment

Sometimes systemic

topical corticosteroid lotion could be beneficial in reducing itching.[4]

See also

  • Skin lesion
  • Cicatricial alopecia

References

Further reading

External links