Image of the Week: A pruritic, erythematous lesion on the foot

A 40-year-old male presents to his family physician with a pruritic, erythematous lesion on his foot after returning from vacation in coastal Brazil a week earlier. He adds that the lesion has migrated since he first noticed it. On examination, a serpiginous, slightly elevated tunnel can be seen on the lateral aspect of his left foot. He is ...