Also in other cancer types as ovarian cancer (Sato et al, 2005), endometrial cancer (Kondratiev et al, 2004), colon cancer (Guidoboni et al, 2001) and lung cancer (Eerola et al, 2000) have intratumoural CD8+ cells that have been correlated to improved prognosis. This evidence concerns the gene CD8A and lung carcinoma.