Spreading Ulcerations and Lymphadenopathy in a Traveler Returning from Costa Rica

A 43-year-old woman presented to the dermatology clinic with widespread scaly plaques and ulcerations of 2 months' duration.Her medical history was otherwise unremarkable.The patient reported that the eruption began after returning from a vacation to Costa Rica, during which she spent time on the beach and white-water rafting.She noted that she had been exposed to numerous insects during her trip, and that her roommate, who had accompanied her, had similar exposure history and lesions.The plaques were refractory to multiple oral antibiotics previously prescribed by primary care.Physical examination revealed submental lymphadenopathy and painless ulcerations with indurated borders without purulent drainage alongside scattered scaly papules and plaques on the face, neck, arms, and legs.A biopsy was taken from an ulceration edge on the left thigh. WHAT IS YOUR DIAGNOSIS?a. chromoblastomycosis b.