| 释义 |
sympathoblast Med.|ˈsɪmpəθəʊblæst|
[f. sympatho- + -blast.]
A small, relatively undifferentiated cell formed in the early development of nerve tissue which develops into a sympathetic neurone. Also symˈpathicoblast, in the same sense.
1927Amer. Jrnl. Path. III. 212 These lesions represent a tumor of a more primitive type of cell (sympathicoblast) than the sympathetic neuroblast. 1934Jrnl. Path. & Bacteriol. XXXIX. 28 Different stages in development may be present in the same tumour e.g. sympathogonia, sympathoblasts and ganglion cells. 1966Experientia XXII. 297 In the developing CNS [sc. central nervous system] and the spinal ganglia, only the sympathoblasts of the primary and secondary trunk of chick embryos contain a varying amount of catechol amine-containing granules.
Hence symˌpathicoblaˈstoma, (less commonly ˌsympathoblaˈstoma) [-oma], a malignant tumour composed chiefly of sympathoblasts.
1927Amer. Jrnl. Path. III. 213 The sympathicoblastomas have often been described as consisting of two types of tissue. 1934Jrnl. Path. & Bacteriol. XXXIX. 29 Sympathicoblastomata are the commonest sympathetic tumours found. 1960Hirosaki Med. Jrnl. XII. 92 (heading) A case of sympathoblastoma, suspected to be Ewing's tumor. 1974Oncology XXIX. 521 Tumour biopsies of a sympathicoblastoma..were obtained when the tumours were removed surgically. |