[Possible relation between viruses and oromaxillofacial tumors. IV. Presence of the herpes antigen and anti-herpes antibodies in patients with tumors of the parotid gland].

The presence of herpesvirus antigen and of antiherpesvirus antibodies was detected in 46% and in 36.3%, respectively, of the patients bearing parotid gland tumors. Very high titers of antiherpesvirus antibodies were found in 70.6% of the patients with nasopharyngeal carcinoma.