[Peripheral cancer of the lung and tuberculosis]

Morphological analysis of 90 observations with a clinical diagnosis of a small peripheral lung carcinoma is performed. The examination of an operation material confirmed diagnosis in 71 cases. Tuberculomas are found in 19 cases. The peripheral lung carcinoma was found to develop in 91.5% (65 cases) against the background of preexisting scars which in 73.8% (48 cases) had a post-tuberculosis and 26.2% (17) post-pneumonia origin. Scars were most frequently related to the healed forms of a focal secondary tuberculosis (30 cases) and sclerotic changes around tuberculomas (8). Post-tuberculosis scars provoking sclerosis and deformation of vessels, bronchi, bronchioles and alveoles with the development of an epithelial dysplasia, are one of the risk factors in the development of a peripheral lung carcinoma. The degradation and fibrinoid changes of a scar tissue infiltrated by a tumour and followed by destruction of scars are observed in peripheral lung carcinomas with a diameter more than 3 cm.