Various aspects of classification of surgical operations in cancer of the lung are presented. The authors suggest their supplement and changes in systematization of surgical interventions in malignant tumors of the lungs published by V.I. Chissov et al. (1995). Basing on the study and analysis of many years experience in surgical treatment of patients with advanced stages of lung cancer in the clinic of thoracic surgery of the Military Medical Academy, the authors suggest classification of combined operations which takes into account both a character and an extent of an extrapulmonary spread of the tumors and thus reflects peculiarities and a high degree of traumatism of surgical intervention and allows to approach more differentially to the assessment of initial and long-term results of surgical treatment of patients.