[Immunocytochemistry in the differential diagnosis of the head and neck tumors].

Immunocytochemical analysis in fine-needle aspirates were performer in 46 cases of head and neck tumors. Immunocytochemical studies helped to establish the differential diagnosis of all diagnostically difficult cases. The application of 3 monoclonal antibodies against keratin, vimentin and LCA permitted to differentiate basic types of malignant tumors.