[What position does primary scar carcinoma of the lung take in surgical treatment of lung cancer? (author's transl)].

The results of surgical treatment of 295 resected peripheral carcinomas of the lung were analysed by tumor staging and histology. 89 cases of scar cancer of the lung have been compared to 206 peripheral cancers. The overall 5-year survival rate was far less in the peripheral lung cancer group (24%). Best prognosis had patients with tumors without lymph node metastasis or adenocarcinoma in the scar (39--45%). These tumors tend to be slowly progressive and metastasize late. When early characteristic signs can be seen on x-ray examination, lung scars should be followed carefully.