[Clinical studies in three cases of pulmonary cryptococcosis]

We report three cases of pulmonary cryptococcosis in which one community acquired and two nosocomial infections were suspected. Clinical studies were focused on histological and immunological diagnosis and antifungal chemotherapy. The first case was initially suspected of having primary cryptococcosis. The second case was first suspected to have BOOP on the basis of clinical and radiological findings. The third was initially suspected of having lung cancer because of an enlarging mass lesion in fibrotic lung and elevated tumor markers. All cases were treated with antifungal agents. Two cases were treated with fluconazole alone, the other case with fluconazole and 5-fluorocytosine. In all cases, the abnormal shadows on chest X-ray demonstrated 50 to 90 percent improvement within 6 months, and cryptococcal antigen in the serum decreased. There were no side effects from the drugs.