[Diagnosis and treatment of lung cancer associated with paracancerous changes in the thoracic cavity].

Incidence of lung cancer associated with secondary paracancerous changes is known to range 13.7-30%. Since they reveal such clinical symptoms as pneumonia or empyema, most out-patients with complicated cancers are referred to general wards. Inflammatory parenchymal pathology may be conducive to false-positive or -negative diagnosis even when highly-sophisticated radiation procedures are used.