The appearance of this foot is most consistent with which one of the following diagnoses?

Answer B. ChromoblastomycosisThe patient lived in a rural area and had walked barefoot for most of his life. Several nodular and verrucous lesions were seen in the distal region of the foot. Analysis of a skin-biopsy specimen revealed findings diagnostic for chromoblastomycosis. Chromoblastomycosis is a chronic, soft-tissue fungal infection commonly caused by Fonsecaea pedrosoi, Phialophora verrucosa, Cladosporium carrionii, or F. compacta. The infection occurs in tropical or subtropical climates and often in rural areas.