pityriasis lichenoides chronica


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pit·y·ri·a·sis li·che·noi·des chron·i·ca

an eruption, lasting up to a few years, of reddish-brown papules with central scaling; it clears without scarring.
[lichenoides Mod. L., fr. G. leichēn, lichen, a lichen-like eruption, + eidos, resemblance; chronica Mod. L. chronic, fr. G. chronikos, pertaining to time; fr. chronos, time]

pityriasis lichenoides chronica

An uncommon, idiopathic dermatosis that primarily affects younger patients (under age 30), which is characterised by waves of erythematous, scaly papules that may persist for months.

Aetiology
Unknown; thought to be a hypersensitivity reaction to viruses—e.g., EBV, adenovirus, parvovirus B19.

Management
Various modalities have been tried, including phototherapy (UV, solar), topical steroids and antibiotics.
References in periodicals archive ?
Pityriasis lichenoides chronica (PLC) and pityriasis lichenoides et varioliformis acuta (PLEVA) are the chronic and acute forms, respectively, of pityriasis lichenoides, an uncommon clonal T-cell disorder.
Adalimumab-induced pityriasis lichenoides chronica that responded well to methotrexate in a patient with psoriasis.
Infliximab-induced pityriasis lichenoides chronica in a patient with psoriasis.
Pityriasis rosea must be differentiated from dermatophytosis, secondary syphilis, psoriasis, pityriasis lichenoides chronica, erythema annulare centrifugum, and pityriasis rosealike drug eruptions.
* Pityriasis lichenoides chronica may mimic pityriasis rosea in distribution, but there are no collarette scales.
(20.) Pinton PC, Capezzera R, Zane C, De Panfilis G: Medium-dose ultraviolet A1 therapy for pityriasis lichenoides et varioliformis acuta and pityriasis lichenoides chronica. J Am Acad Dermatol 2002;47:410-4.
Bromelain is also effective in treating a skin disorder called pityriasis lichenoides chronica, which is characterized by the appearance of long-lasting, asymptomatic skin lesions.
Other conditions that can trigger PR include secondary syphilis (characterized by involvement of the palms and soles, lymphadenopathy, and greater lesional infiltration); seborrheic dermatitis (characterized by greater involvement of the scalp and other hairy parts of the body); nummular eczema (more pruritic); and pityriasis lichenoides chronica, which involves more chronic and relapsing lesions.
Pityriasis lichenoides chronica specimens showed spongiosis in all of its samples.
OBJECTIVES: Pityriasis lichenoides chronica (PLC) is a skin disease of unknown etiology.