Derm Dx: Nonhealing pruritic rash after vacation

A 28-year-old man developed a pruritic, nonhealing rash after brushing his hand and leg against coral while snorkeling in the British Virgin Islands. The patient did not notice any stinging or pruritus and found no foreign material in the abrasion.

During the ensuing nine days, however, the areas became inflamed, pruritic and tender. He denied fever or other systemic symptoms. ...