Blastomycosis of the nose: A case report.

Blastomyces dermatitidis is a thermally dimorphic fungus endemic to the North American soil near the Mississippi, Ohio, and St. Lawrence river valleys, as well as the Great Lakes Basin. It is responsible for blastomycosis, a systemic pyogranulomatous disease. Blastomycosis of the head and neck is decidedly uncommon and often mistaken for cancer. There are only 3 previous case reports of blastomycosis presenting as an intranasal lesion. We report the unusual case of a 24-year-old man with blastomycosis presenting with a 4-week history of a progressively enlarging intranasal mass who had complete resolution of symptoms after treatment with itraconazole and surgical excision of the lesion.