paraganglia


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paraganglion

 [par″ah-gang´gle-on] (pl. paragan´glia)
a collection of chromaffin cells, derived from neural ectoderm, occurring outside of the adrenal medulla, most commonly near the sympathetic ganglia and in relation to the aorta and its branches. Most, if not all, of the paraganglia secrete epinephrine or norepinephrine.

par·a·gan·gli·a

(par'ă-gang'glē-ă),
Plural of paraganglion.

par·a·gan·gli·a

(par'ă-gang'glē-ă)
Plural of paraganglion.

paraganglia

(păr″ă-găng′lē-ă) paraganglion [″ + ganglion, knot]
Groups of chromaffin cells, similar in staining reaction to cells of the adrenal medulla, associated anatomically and embryologically with the sympathetic system. They are located in various organs and parts of the body.
References in periodicals archive ?
Tympanic paragangliomas are neuroendocrine neoplasms located in the middle ear and arising from chromaffin cells of the parasympathetic paraganglia.
Phaeochromocytomas are neuro-endocrine catecholamine-secreting tumours that arise from chromaffin cells of the adrenal medulla or sympathetic paraganglia.
Tumors of the Adrenal Gland and Extra-Adrenal Paraganglia.
Pheochromocytomas are uncommon tumors arising from the adrenal medulla and the sympathetic paraganglia.
The normal paraganglia consists of nests of chief cells (type1) and sustentacular cells (type 2).
Paragangliomas are uncommon neoplasms that can arise in extra-adrenal paraganglia or in the adrenal medulla, with the latter conventionally classified as pheochromocytomas.
2) Paragangliomas are highly vascular and slow growing tumors (5 mm annually) deriving from the paraganglia, which are specialized tissue of the extra-adrenal neuroendocrine system.
They can present anywhere along the sympathetic paraganglia chains from the neck to the pelvis, but they occur most often intra-abdominally in the periaortic region and the organ of Zuckerkandl.
US and European pathologists offer a broad reference to diseases of the endocrine organs--the thyroid, parathyroid, pituitary, adrenal glands and the paraganglia.
Cytokine receptors have been identified in the limbic structures of the brain, peripherally in the paraganglia of the spinal cord, and on lymphocytes.
Laryngeal paragangliomas are rare neoplasms that originate in the neural crest cells of the laryngeal paraganglia.
Because of its association with amine/ peptide secretory materials, CGA is expressed in chromaffin cells (adrenal medulla, paraganglia, among others), enterochromaffin-like cells, and b cells of the pancreas but not in steroid hormone producing cells (adrenal cortex, gonads, for instance).