Endometrium with changes due to selective progesterone receptor modulators

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Selective progesterone receptor modulators, abbreviated SPRMs, are a class of drugs that block the action of progesterone. They are used to treat uterine fibroids.[1]

Microscopic

Features:[1]

  • Glandular changes - extensive cystic dilatation.
  • Inactive appearing glandular epithelium or abortive subnuclear vacuolization.
  • Rare mitoses and apoptosis.
  • Abnormal stromal vessels - common.

DDx:

See also

References

  1. 1.0 1.1 Williams, AR.; Bergeron, C.; Barlow, DH.; Ferenczy, A. (Nov 2012). "Endometrial morphology after treatment of uterine fibroids with the selective progesterone receptor modulator, ulipristal acetate.". Int J Gynecol Pathol 31 (6): 556-69. doi:10.1097/PGP.0b013e318251035b. PMID 23018219.