A 66-year-old man went to the doctor after experiencing an extremely itchy rash for the preceding 2 months. On examination, numerous sizable erythematous and edematous plaques with surrounding hyperpigmented patches were noted on his trunk. Some plaques had an arcuate configuration. The patient’s medical history was unremarkable except for a history of thymoma.
Is it erythema gyratum repens, eosinophilic annular erythema, subacute cutaneous lupus erythematosus, or glucagonoma syndrome?
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