Pityriasis lichenoides et varioliformis acuta - Skin in Child
L41.0 – Pityriasis lichenoides et varioliformis acuta
86487001 – pityriasis lichenoides et varioliformis acuta
- Lymphomatoid papulosis – Predominantly CD30+ cells in the infiltrate, in older patients, characterized by more nodular lesions, and active lesions do not spontaneously resolve as quickly as PLEVA.
- Vasculitis – Check serologies for RF, ANA, anti-ds DNA, ANCA, cryoglobulins. C3, C4 levels. Lesions are mostly purpuric and more monomorphous.
- Varicella – Prodrome of mild fever, malaise, and myalgia followed by pruritic erythematous papules. Lesions are pruritic. Recurrent eruptions are not a feature of varicella.
- Arthropod bites
- Dermatitis herpetiformis – Exquisitely pruritic. Ruled out by direct immunofluorescence on the skin biopsy.
- Pityriasis rosea – Herald patch, scaly papules/plaques. Crusts, vesicles, and bullae are not common findings.
- Lichen planus – Very pruritic; lesions are typically monomorphous and rarely crusted.
- Cutaneous T-cell lymphoma is rare in children and tends to present with larger patches and plaques.
- Perforating dermatoses
- Primary HIV infection
- Erythema multiforme
- Guttate psoriasis