Plantar hyperkeratosis due to Fusarium verticillioides in a patient with malignancy

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We report the case of an 82-year-old man with hyperkeratosis of the right sole caused by a Fusarium verticillioides infection mimicking verrucous tuberculosis; the infection was confirmed by direct potassium hydroxide microscopy, biopsy and cultures. The biopsy specimen showed an unusually deep invasion of fungal elements into the epidermis. This is an uncommon presentation in a localized cutaneous infection by Fusarium but in this case, repeated local injuries were the portal of entry initiating the process. Clinical patterns of cutaneous fusarium infections in general are also discussed.

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