[Immunohistologic findings in paragangliomas in the area of the head and neck].

30 patients with paraganglioma of the head and neck region were subjected to surgery at the Department of Otorhinolaryngology during 1978-1985. Histological classification of the obtained specimens was performed using also immunocytochemical methods to detect more details. The site of origin of the tumours was the glomus tympanicum in 18 cases, 7 times the glomus caroticum and 5 times the glomus jugulare. Antibodies against neuronal components (S-100 protein), endothelial cells (UEAI) and endocrine activity (NSE) were used for subtyping by PAP-method (Figs. 1-3). Immunocytochemistry provided for an easy subtyping of the tumours and showed an increase in severe progress forms in adenomatous variants of paragangliomas.