One of the small ovoid collections of cells occurring in the walls of the ganglia of the SYMPATHETIC NERVOUS SYSTEM adjacent to the SPINAL CORD. They are CHROMAFFIN cells and sometimes secrete ADRENALINE.
n. one of the small oval masses of cells found in the walls of the ganglia of the sympathetic nervous system, near the spinal cord. They are *chromaffin cells, like those of the adrenal gland, and may secrete adrenaline.
1. a benign tumour arising from *paraganglion cells associated with the vagus or glossopharyngeal nerves in the neck (see paraganglioma). In the middle ear they are called glomus tympanicum tumours; around the jugular vein they are called glomus jugulare tumours. 2. (glomangioma) a harmless but often painful tumour produced by malformation and overgrowth of a *glomus, usually in the skin at the ends of the fingers or toes. It may be cauterized or removed surgically.... glomus tumour
n. a tumour, related to *phaeochromocytoma, arising from *paraganglion cells. Such tumours can occur around the aorta, the carotid artery (carotid body tumour), and the cervical portion of the vagus nerve (*glomus tumour), as well as in the abdomen and the eye. They are usually benign and treated by surgery, but occasionally can be malignant, requiring systemic treatment.... paraganglioma
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