[Prognostic value of the histopathological diagnosis of salivary gland tumors. New techniques].

The argyrophil (Ag+ NOR) staining for nucleolar organizer region (NORs) applied to a series of benign and malignant salivary tumours reveals some differences which can be useful for the prognosis of those tumours. This new technique may be of diagnostic help in equivocal small biopsies or in cytological samples.