The clinicoroentgenological pictures of pulmonary tuberculosis located in segment VI in 90 patients and the results of their treatment were analyzed. Among the clinical forms, only infiltrative tuberculosis (88.9 per cent) and tuberculoma (11.1 per cent) were diagnosed. In 92.7 per cent of the patients the destruction phase was stated. Pneumonia was detected in almost half of the patients with acute and subacute processes of the disease. Tuberculosis in them was confirmed within the periods from 1 to 6 months. This is indicative of late diagnosis in some of them. Diagnostic mistakes were mainly associated with the features of the process localization and defective bacteriological and roentgenological examinations since the clinical signs and histories were typical of tuberculosis. The treatment results were estimated in 79 patients who stayed in hospital for at least 2 months. Closure of destructive cavities was observed in 73.7 per cent of the patients against 81.1 per cent in the control group. Abacillation was recorded in 96.5 per cent of the patients.