Which condition is described by erythematous plaques with central clearing and fever?

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Study for the Step 3 UWSA Exam with our challenging quiz. Prepare with detailed explanations for each question, ensuring you're well-equipped for success. Enhance your understanding and boost your exam confidence!

Multiple Choice

Which condition is described by erythematous plaques with central clearing and fever?

Explanation:
Erythema multiforme is suggested by target-like lesions: erythematous plaques with a central dusky area and concentric rings. These “target” lesions are characteristic, and fever often accompanies this reaction, reflecting a systemic inflammatory response frequently triggered by infections (like HSV) or certain drugs. Other conditions fit lesions differently: tinea corporis can cause ring-shaped plaques with central clearing but typically lacks fever and the classic target appearance; urticaria shows transient, pruritic wheals rather than fixed target plaques; psoriasis presents as chronic, well-demarcated plaques with silvery scales and usually not fever or central clearing.

Erythema multiforme is suggested by target-like lesions: erythematous plaques with a central dusky area and concentric rings. These “target” lesions are characteristic, and fever often accompanies this reaction, reflecting a systemic inflammatory response frequently triggered by infections (like HSV) or certain drugs.

Other conditions fit lesions differently: tinea corporis can cause ring-shaped plaques with central clearing but typically lacks fever and the classic target appearance; urticaria shows transient, pruritic wheals rather than fixed target plaques; psoriasis presents as chronic, well-demarcated plaques with silvery scales and usually not fever or central clearing.

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