Experiences with 197HgCl2 in the diagnosis of head and neck malignancies

197 Hg Cl2 (mercuric dichloride) was used in the diagnosis of 30 cases of epidermoid carcinoma of the head and the neck, and in 5 cases of benign tumours and non-neoplastic lesions. The results show that radioisotope scanning is not a certain method of diagnosis but that it affords supplementary information essential to correct therapy.