Pityriasis lichenoides is an uncommon, acquired, idiopathic, self-limiting skin disease that poses a challenge to patients and clinicians to diagnose and treat. Several variants exist including pityriasis lichenoides et varioliformis acuta (PLEVA), pityriasis lichenoides chronica (PLC), and febrile ulcer-onecrotic Mucha-Habermann disease. Precise classification can be difficult due to an overlap of clinical and histologic features. In this case report we describe a patient with a rare presentation of PLC exhibiting bilateral palmoplantar involvement and mimicking psoriasis. We review the literature and discuss the clinical course, pathogenesis, and current treatment modalities of PLC.
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Article Synopsis
- Pityriasis lichenoides is a rare inflammatory skin condition characterized by red-brown papules and crusty lesions as they evolve over time.
- A 60-year-old woman developed the chronic form of this condition ten days after suffering from streptococcal pharyngitis, starting with purple spots on her legs and later developing red, scaly patches on other parts of her body.
- After treatment with methylprednisolone and hydroxychloroquine, her skin lesions improved significantly and did not return.
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