pheochromocytomata

pheochromocytoma

[fee-oh-kroh-moh-sahy-toh-muh]
noun, plural pheochromocytomas, pheochromocytomata [fee-oh-kroh-moh-sahy-toh-muh-tuh] . Pathology.
a tumor of the sympathetic nervous system or adrenal medulla, that produces excess norepinephrine and epinephrine and causes hypertension, headaches, nausea, etc.

Origin:
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)

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American Heritage
Medical Dictionary

pheochromocytoma phe·o·chro·mo·cy·to·ma (fē'ō-krō'mō-sī-tō'mə)
n. pl. phe·o·chro·mo·cy·to·mas or phe·o·chro·mo·cy·to·ma·ta (-mə-tə)
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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