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Mucha-Habermann disease Synonyms Pityriasis lichenoides Presentation stereotypical Age and sex Children and young adults especially; more common in males Distribution of lesions Widespread, particularly arms, legs, trunk, and buttocks Arrangement of lesions Scattered but discrete Individual lesions Red macules and papules, purpuric and necrotic papules, vesicles, ulcers, and scars Course Sometimes transient, i.e., weeks, or […]