[Parathyrin content of lung cancer patients undergoing surgical and chemotherapeutic treatment].

Parathyrin concentration was determined in lung cancer patients prior to and after operation by using a radiological method. A preoperative elevated level of parathyrin was noted in 60.4% of the patients. Radical surgery resulted in the return of the parathyrin level to normal, and toxic effects caused by chemotherapy were accompanied by its sharp increase. A similar increase in the parathyrin level attends generalization of a tumor process.