theca folliculi

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theca

 [the´kah] (L.)
a case or sheath. adj., adj the´cal.
theca cor´dis pericardium.
theca folli´culi an envelope of condensed connective tissue surrounding a vesicular ovarian follicle; it is composed of an internal vascular layer (theca interna) and an external fibrous layer (theca externa).

the·ca fol·lic·'u·li

the wall of a vesicular ovarian follicle.
See also: tunica externa, tunica interna thecae folliculi.

the·ca fol·lic·u·li

(thē'kă fŏ-lik'yū-lī)
The wall of a vesicular ovarian follicle.
See also: tunica externa

theca

pl. thecae [L.] a case or sheath.

theca cell
an epithelioid cell of the corpus luteum.
theca cordis
pericardium.
theca folliculi
an envelope of condensed connective tissue surrounding a vesicular ovarian follicle, comprising an internal vascular layer (theca interna) and an external fibrous layer (theca externa).
granulosa theca cell tumor
may secrete estrogen and progesterone in dogs and cause persistent or irregular estrus, alopecia, enlargement of nipples and vulva. Uterine changes range from cystic endometrial hyperplasia to pyometra.
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References in periodicals archive ?
Cx43 was not detected at the thecal cell layer or at the border between GCs and oocytes where Cx26 and Cx32 were found to be predominant, respectively (data not shown).
primary 300-530 Yolk globules appear between the yolk yolk vesicles and increase in number; both granulosa and thecal cell layers are clearly observed.
Regulation of androgen production in cultured human thecal cells by insulin-like growth factor I and insulin.
These thecal cells secrete estrogen and hence tumors like fibrothecomas, thecomas may be concomitantly associated with an enlarged uterus, endometrial hyperplasia or frank endometrial carcinoma.
Notably, NGF activation of TrkA in cultured thecal cells is reported to be involved in the disruption of gap junctions (Mayerhofer, 1996).
Insulin stimulates testosterone biosynthesis by human thecal cells from women with polycystic ovary syndrome by activating its own receptor and using inositolglycan mediators as the signal transduction system.
Progesterone is then converted to androstenedione by the actions of the 17[alpha]-hydroxylase and 17,20-lyase enzyme complex, which is present in thecal cells but not in granulosa cells.