theca

After ovulation, the granulosa and theca of the follicle remained within the ovary, which subsequently formed the post ovulatory follicle (POF).

Theca cells derived from PCOS ovaries and propagated in long-term culture demonstrate increased CYP11A expression compared to normal theca cells [54, 55].

CL: corpus luteum; IG: interstitial glands; FC: follicular cyst; G: granulosa; TI: theca interna; Ov: ovocyte (adapted from Ongaro et al.

Cy = cyst; E = epithelial cells; F = follicle; G and T = granulosa and theca layers of the stromal follicle; S = stroma; TG = tumor gland.

Superoxide dismutase, copper-zinc superoxide dismutase, and manganese superoxide dismutase are located in the granulosa and theca cells of developing follicles (17).

TNF-[alpha] was expressed at very low levels in follicular theca layer.

Preantral follicle has an oocyte, surrounded by multiple layers of granulosa cells which isolate from theca cells by the basement membrane.

These were suggestive of theca lutein cysts of pregnancy in both enlarged ovaries in association with the partial hydatidiform mole.

In conulariids the periderm is composed of thin lamellae (van Iten 1991, 1992a, 1992b) and thus in this aspect resembles the theca of Byronia.

However, the complete development of the oocyte within the follicular structure requires continuous two-way communication between the oocyte and cumulus cells that surround it (cumulus-oocyte complex), as well as other somatic cells included in the follicle, such as theca and the granulosa cells (Eppig et al., 2002; Gandolfi et al., 2005; Edson et al., 2009; Wigglesworth et al., 2013).

The differential diagnosis for adnexal mass is broad and includes follicular or corpus luteum cysts, mature teratoma, theca lutein cyst, hydrosalpinx, endometrioma, cystadenoma, pedunculated leiomyoma, luteoma, as well as malignant neoplasms of epithelial, germ cell, and sex cord-stromal origin (J Ultrasound Med.