| tropho- | Troph- Food, nutrition. Origin: G. Trophe, nourishment (05 Mar 2000) |
|---|---|
| trophoblast | <embryology> Extra embryonic layer of epithelium that forms around the mammalian blastocyst and attaches the embryo to the uterus wall. Forms the outer layer of the chorion and together with maternal tissue will form the placenta. (18 Nov 1997) |
| trophoblast protein 1 | <protein> Protein secreted by trophoblasts, which prolongs the lifetime of the corpus luteum, thus signalling pregnancy. Structurally related to interferons. (18 Nov 1997) |
| trophoblastic | Relating to the trophoblast. (05 Mar 2000) |
| trophoblastic lacuna | One of the spaces in the early syncytiotrophoblastic layer of the chorion before the formation of villi; in human embryos maternal blood enters these spaces by the 10th day; with the differentiation of the chorionic villi they become intervillous spaces, sometimes called intervillous lacunae. (05 Mar 2000) |
| trophoblastic neoplasms | Trophoblastic growth, which may be gestational or nongestational in origin. Trophoblastic neoplasia resulting from pregnancy is often described as gestational trophoblastic disease to distinguish it from germ cell tumours which frequently show trophoblastic elements, and from the trophoblastic differentiation which sometimes occurs in a wide variety of epithelial cancers. Gestational trophoblastic growth has several forms, including hydatidiform mole and choriocarcinoma. (12 Dec 1998) |
| trophoblastic operculum | The mushroom-shaped plug of fibrin that fills the aperture in the endometrium made by the implanting ovum. (05 Mar 2000) |
| trophoblastic tumour | <oncology, tumour> A malignant and rapidly growing tumour which arises from foetal tissue. The preceding factor is a hydatidiform mole. Symptoms include continued vaginal bleeding in a women with a recent history of hydatidiform mole, abortion or term pregnancy. (27 Sep 1997) |
| trophoblastic tumour, placental site | A tumour that arises from the trophoblast of the placental bed and is composed mainly of cytotrophoblastic cells. It encompasses lesions of low- and high-grade malignancy. (holland et al., cancer medicine, 3d ed, p1691) (12 Dec 1998) |
| trophoblastoma | <tumour> Obsolete term for choriocarcinoma. (05 Mar 2000) |
| trophochromatin | Synonym: trophochromidia. Origin: tropho-+ G. Chroma, colour (05 Mar 2000) |
| trophochromidia | Nongerminal or vegetative extranuclear masses of chromatin, found in certain protozoan forms; e.g., the macronucleus of certain ciliates, such as Paramecium. Synonym: trophochromatin. (05 Mar 2000) |
| trophocyte | A cell that supplies nourishment; e.g., Sertoli cells in the seminiferous tubules. Synonym: trephocyte. Origin: tropho-+ G. Kytos, cell (05 Mar 2000) |
| trophoderm | The trophectoderm, or trophoblast, together with the vascular mesodermal layer underlying it. See: serosa. Origin: tropho-+ G. Derma, skin (05 Mar 2000) |
| trophodermatoneurosis | Cutaneous trophic changes due to neural involvement. (05 Mar 2000) |