[The clinical and morphological features of pulmonary tuberculosis under the conditions of the Far North].

The clinical and morphological features of pulmonary tuberculomas were studied in 205 patients among the naives and newcomers of the Far North. It was established that the lymphohematogenous spread of tuberculosis involving mainly the lymphatic system into the inflammatory process predominates in the genesis of tuberculomas under the conditions of the Far North. At the same time the lymphatic genesis of tuberculosis was found to affect the development of pulmonary tuberculomas in 60% of cases among the native patients. In most patients, the afflicted intrathoracic lymph nodes became a source of retrograde dissemination of tuberculosis in the lung. Tuberculomas were chiefly unilateral and in 56.7% of cases they were located in the lower portions of the lung in the presence of significant fibrosis. The lymphohematogenous spread of tuberculous infection was a cause of pulmonary tuberculomas in most (72.9%) newcomers on adapting to the conditions of the Far North. In most cases, tuberculomas were formed from a newly appeared tuberculous focus in the presence of intact lung tissue and located in the upper portions of both lungs. The formed tuberculomas had no extensive focal dissemination and were present within the anatomic structure of one or two segments of the lung.