Pulmonary sequestration with primary blastomycosis. Failure of ketoconazole therapy after resection.

Infection with Blastomyces dermatitidis developed in a girl with occult pulmonary sequestration. Six months after resection, while receiving ketoconazole, she developed an abscess due to B dermatitidis over the scar from thoracotomy, with a sinus tract to the eighth rib. This was successfully managed with débridement, rib resection, and amphotericin B. Contiguous bone involvement should be suspected in sequestra infected with this organism; débridement and therapy with amphotericin B might be indicated.