phæochrome, a. Histology.
(ˈfiːəʊkrəʊm)
Also pheo-.
[f. Gr. ϕαιός dusky + χρῶµα colour.]
= chromaffin a.
| 1909 Bailey & Miller Text-Bk. Embryol. xv. 43 The medulla is composed of irregularly arranged sympathetic ganglion cells and other granular cells which, after treatment with chrome salts, acquire a peculiar brownish color. The brown cells are known as chromaffin (or phæochrome) cells and their granules as chromaffin (or phæochrome) granules. 1929 M. A. Goldzieher Adrenals v. 223 The phæochrome tumors produce an excessive amount of adrenalin. 1941 R. G. Hoskins Endocrinol. ii. 51 A tumor made up of pheochrome cells..may be situated in either the adrenal medulla or in one of the paraganglia. 1956 Robson & Keele Recent Adv. Pharmacol. (ed. 2) i. 29 Phæochrome tumours..are benign in nearly 90 per cent of cases. |