sympatho-
(ˈsɪmpəθəʊ)
combining form of sympathetic a. (n.), used to form terms relating to the sympathetic nervous system; also symˈpathico-; ˌsympathoˈgonia (-ˈgəʊnɪə) n. pl. Med. [ad. G. sympathogonien (H. Poll 1906, in O. Hertwig Handb. d. vergleichenden und exper. Entwickelungslehre d. Wirbeltiere V. iii. i. 460), f. Gr. γόνος offspring, begetting], undifferentiated embryonic cells of the sympathetic nervous system which give rise to sympathoblasts; also used as sing.; ˌsympathogoniˈoma, symˌpathicogoniˈoma [-oma], a malignant tumour composed chiefly of sympathogonia.
| 1934 Jrnl. Path. & Bacteriol. XXXIX. 28 The sympathogonia from which the medulla of the suprarenal takes origin, as first described by Wiesel (1902), began to invade the anlage of the adrenal cortex. 1966 Pharmacol. Rev. XVIII. 659 The common progenitor, called sympathogonia, is a small lymphocyte-like cell with a dense, chromatin-rich, spherical or pyriform nucleus and a scanty rim of clear, poorly-staining cytoplasm. |
| 1934 Jrnl. Path. & Bacteriol. XXXIX. 28 Those formed of sympathogonia have been classified as sympathogoniomas. 1966 Pharmacol. Rev. XVIII. 659 Each of these three types of sympathetic cell may give rise to a tumor: the sympathogonia to a sympathogonioma; the sympathoblast to a sympathoblastoma; and the ganglion cell to a ganglioneuroma. 1974 Oncology XXIX. 521 Tumour biopsies of a..sympathicogonioma..were obtained when the tumours were removed surgically. |