How are ovaries characterized in polycystic ovarian syndrome (PCOS)?

Updated: Sep 19, 2019
  • Author: Richard Scott Lucidi, MD, FACOG; Chief Editor: Richard Scott Lucidi, MD, FACOG  more...
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Answer

Polycystic ovaries are enlarged bilaterally and have a smooth, thickened capsule that is avascular. On cut sections, subcapsular follicles in various stages of atresia are seen in the peripheral part of the ovary. The most striking ovarian feature of PCOS is hyperplasia of the theca stromal cells surrounding arrested follicles. On microscopic examination, luteinized theca cells are seen.


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