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pheochromocytoma

[ fee-oh-kroh-moh-sahy-toh-muh ]
/ ˌfi oʊˌkroʊ moʊ saɪˈtoʊ mə /
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noun, plural phe·o·chro·mo·cy·to·mas, phe·o·chro·mo·cy·to·ma·ta [fee-oh-kroh-moh-sahy-toh-muh-tuh]. /ˌfi oʊˌkroʊ moʊ saɪˈtoʊ mə tə/. Pathology.
a tumor of the sympathetic nervous system or adrenal medulla, that produces excess norepinephrine and epinephrine and causes hypertension, headaches, nausea, etc.
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Origin of pheochromocytoma

1925–30; pheochromocyte a chromaffin cell of the adrenal medulla (pheochrome chromaffin (<Greek phai(ós) dusky + -o- + -chrome) + -o- + -cyte) + -oma; compare German Phäochromocytom (1912)

Words nearby pheochromocytoma

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Medical definitions for pheochromocytoma

pheochromocytoma
[ fē′ō-krō′mō-sī-tōmə ]

n. pl. phe•o•chro•mo•cy•to•mas
A usually benign tumor of the adrenal medulla or the sympathetic nervous system in which the affected cells secrete increased amounts of epinephrine or norepinephrine.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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