Within the five-year period (1984-1988) the oat cell bronchogenic carcinoma was diagnosed and treated in 151 patients. Analysed were 74 patients having received complete treatment. Patients with disseminated form received only polychemotherapy in 6 cycles (cyclophosphamide, doxorubicin, vincristine and etoposide) and those with limited disease also received additional, local-regional radiotherapy of 45-50 Gy. In complete respondents preventive brain irradiation was applied. In selected patients with initial forms of the disease surgical resection with additional polychemotherapy were applied. The best survival showed respondents with limited disease and operated patients. Average survival of the whole group was 72 weeks. One year survived 31 out of 74 (41.9%) patients and two years survived 10 out of 74 (13.5%) patients.