Professional and Linguistic Assessments Board (PLAB) Practice Exam

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How would you describe the lesions of E. marginatum?

Flat and non-pigmented
Raised and scaly
Pink rings with a clear center
Papular and very itchy

The correct answer is: Pink rings with a clear center

Erythema marginatum is characterized by distinct lesions that take the form of pink or red rings with a clear center, often showing a well-defined border. These lesions typically appear on the trunk and proximal extremities and can expand outward over time. The central area may fade, which contributes to the ring-like appearance, making it a key feature of this condition. This description aligns with the presentation of E. marginatum, often associated with rheumatic fever, and helps differentiate it from other skin conditions that may have varying presentations in terms of color, texture, and associated symptoms. The other descriptions do not accurately reflect the typical appearance of E. marginatum, as they suggest different features that do not correspond to the characteristic ringed lesions seen in this condition.