Ovaries (Ovary)

• theca
  3 March

  theca of follicle ; theca folliculi ; follicular theca WKP
  Definition : The theca folliculi comprise a layer of the ovarian follicles. They appear as the follicles become secondary follicles.
  The theca are divided into two layers, the theca interna and the theca externa.
  Theca cells are a group of endocrine cells in the ovary made up of connective tissue surrounding the follicle. They have many diverse functions, including (...)

• theca externa
  3 March

  WKP
  Definition : The theca externa is the outer layer of the theca folliculi. It is derived from connective tissue, the cells resembling fibroblasts, and contains abundant collagen.
  During ovulation, the surge in luteinizing hormone increases cAMP which increases progesterone and PGF2α production. The PGF2α induces the contraction of the smooth muscle cells of the theca externa, increasing intrafollicular pressure.
  This aids in rupture of the mature oocyte, or immature oocyte at the (...)

• theca interna
  3 March

  WKP
  Definition : Theca lutein cells are also known as small luteal cells.
  Theca interna cells express receptors for luteinizing hormone (LH) to produce androstenedione, which via a few steps, gives the granulosa the precursor for estrogen manufacturing.
  After rupture of the mature ovarian follicle, the theca interna cells differentiate into the theca lutein cells of the corpus luteum. Theca lutein cells secrete androgens and (...)

• nests of epithelial cells in ovary
  26 October 2020

  Examples
  nests of transitional-type epithelial cells with longitudinal nuclear grooves (coffee bean nuclei) lying in abundant fibrous stroma > Brenner tumor https://twitter.com/Patholwalker/status/1320473164187533312
  See also
  ovarian anomalies

• nests of transitional-type epithelial cells in ovary
  26 October 2020

  nests of transitional-type epithelial cells with longitudinal nuclear grooves (coffee bean nuclei) lying in abundant fibrous stroma.
  Etiology
  Brenner tumor

• chorionic villi on ovarian surface
  15 September 2020

  See also
  chorionic villi
  ovarian surface

• ovarian hilus
  9 June 2020

  Hilar cell

• thyroid gland tissue in ovary
  29 April 2020

  Etiology
  struma ovarii / ovarian mature teratoma Struma ovarii represents less than 3% of ovarian teratomas. It can be associated with thyroid biology abnormalities, and in exceptionally rare cases it can be malignant.
  Images
  Struma ovarii https://twitter.com/drshahinhameed/status/745148173094555650 https://twitter.com/slusagar/status/1255253945959809029
  Digital cases
  JRC:13319 : Struma ovarii.
  pathxchange.org #17031
  See also
  ovarian (...)

• ovarian serous carcinoma
  11 February 2020

  PO
  Types
  ovarian low-grade serous carcinoma
  ovarian high-grade serous carcinoma
  See also
  ovarian tumors ovarian serous tumors
  serous carcinoma

• ovarian serous borderline tumor, micropapillary variant
  11 February 2020

  low grade serous carcinoma PO
  Definition : micropapillary variant ovarian serous borderline tumor.
  Ovarian serous borderline tumor, micropapillary variant behaves like low-grade adenocarcinoma. It appears to be derived from serous borderline tumor or adenofibroma. Invasive if destructive infiltrative growth; most are non-invasive.
  It recurs as classic serous carcinoma.
  Prognosis : 10 year survival is 70% vs. 100% for borderline tumors
  See also
  ovarian tumors ovarian serous (...)

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