Not Yawns

A young immigrant from Ghana where he lived in crowded camps presents with the lesion seen below:

This is the "mother lesion"; note the red, moist base reminiscent of a raspberry ("framboesia"). It will heal in 3 to 6 months when it will regress into a depigmented pitted scar with dark margins. The patient also complains of arthralgias. Exam shows regional lymphadenopathy and palmar and plantar hyperkeratotic plaques.

Challenge: What's your diagnosis?

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