Mucormycosis and cutaneous histoplasmosis in a renal transplant recipient.

Mucormycosis of the palate developed in a 31-year-old man while he was undergoing immunosuppression with prednisone and azathioprine after renal transplantation. The infection was excised and did not recur. Ten years later, while still receiving immunosuppressive therapy, cutaneous histoplasmosis of the fingers developed, which was treated successfully with intravenous amphotericin B. The occurrence of mucormycosis and histoplasmosis in this man emphasizes the need to suspect uncommon infections when unusual skin lesions occur in an immunosuppressed patient.