The authors studied 166 head and neck tumors of patients admitted to the A.C. Camargo Hospital using the method of fine needle aspiration cytology (FNAC) in order to correlate these findings with pathohistological diagnoses. The correlation was possible in 81 cases: 3 cases were false negative and 1 was false positive. FNAC sensibility was 90.6%, specificity was 97.9%, and efficiency was 95%.