Lichen spinulosus in Adult
Although usually localized to certain sites of predilection, a more severe generalized variant of lichen spinulosus also exists. This variant occurs in association with nodulocystic acne and pityriasis rubra pilaris as part of type VI (HIV-associated) pityriasis rubra pilaris. Additional rare associations include Crohn disease, Hodgkin disease, seborrheic dermatitis, syphilis, id reactions to fungal infections, and heavy metal ingestions. Note that these associations are not causal relationships and may be the consequence of ascertainment bias.
Lichen spinulosus has a variable course. Most cases tend to resolve spontaneously at puberty; however, persistent cases have also been described. Although no treatment is required, effective therapeutic options include topical keratolytic agents and topical retinoids.
L73.8 – Other specified follicular disorders
4859009 – Lichen spinulosus
Differential Diagnosis & Pitfalls