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JAMA Internal Medicine - PCOS renamed PMOS (May 2026)

Tier 1: Established: peer-reviewed research or government health authority
Publisher: JAMA Internal Medicine · Published: May 11, 2026 · Accessed: August 18, 2026

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Claims this source supports

  • An international group of experts renamed polycystic ovary syndrome (PCOS) to polyendocrine metabolic ovarian syndrome (PMOS) in a research letter published online May 11, 2026 by JAMA Internal Medicine.
  • The word 'cyst' was removed because many of the 170 million women worldwide with the condition don't actually have ovarian cysts - they have an excess of small antral follicles (tiny fluid-filled sacs each containing an immature egg), whereas cysts are typically larger and may cause pain or rupture.
  • 'Polyendocrine' reflects that the condition involves several hormone systems; 'metabolic' reflects PMOS's effects on how the body regulates blood sugar, uses insulin, and stores energy.
  • The rename is intended to encourage clinicians and scientists to treat the syndrome as a broader condition, speeding diagnosis and improving care.