The study carried out during 1991-1995 concerns 50 subjects with lung cancer confirmed by microscopy registered in the Oncology Department of Craiova University Hospital. The patients were studied on terms of clinical stage which indicated the regime of treatment associations: surgery + chemotherapy + radiotherapy, chemo-radiotherapy, chemo-immunotherapy, in order to improve surviving. The treatment results were assayed for each group of patients according to the international criteria of treatment response evaluation. The efficiency of various cytostatics associations according to histopathologic form was finally evaluated on terms of asymptomatic period and survival duration.