Cholinesterase unit establishment and issuing of >>Warning Cards<< for carriers of suxamethonium sensitive serum butyrylcholinesterase variants.

Recognition of butyrylcholinesterase (EC 3.1.1.

[Bilateral glomus caroticum tumors].

Paragangliomas of the head and neck are tumors which are believed to function as chemosensory reflex receptors that respond to changes in their chemical environment. They may occur in the carotid body, on the vagus nerve, along the jugular vein, in the middle ear, in the orbit, in the larynx and nasopharynx. The incidence of multiple paragangliomas is about 3% of all the patients with this tumor and 26% of the patients with positive family history.

Laryngeal cancer and blood selenium levels.

Blood selenium concentrations in 43 patients with laryngeal cancer and 47 normal subjects were determined by atomic absorption spectrophotometry. No significant differences in selenium values were observed in sera from the cancer patients when compared with controls, but there were significant differences between patients with advanced (T4) supraglottic cancers and the normal controls. These results suggest that lower blood selenium levels in this latter group of laryngeal cancer patients may be a consequence of their disease rather than its cause.