Planocellular carcinomas grow rapidly infiltrating the surrounding tissues. Because of that approach to the treatment of the patients must be multidisciplinary. A series of 101 patients with tongue and mouth floor carcinoma were analyzed. All were surgically treated in the period 2000. through 2007. The clinically evidenced local spread (cT) is highly correlated to the intraoperatively and patohistologically evidenced spread (pT) ~84%. The degree of correlation falls with increase of the T stage. The clinically evidenced regional spread (cN) and intraoperatively and patohistologically evidenced of regional spread (pN) presented lower in ~57% correlation then corresponding T categories. The study proves that multidisciplinary approach to the patients with oral carcinomas is the base for their proper treatment.