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: