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ESR1-NCOA2 gene fusion in a myometrial UTROSCT (Patient 3): (A) At low-magnification areas of the tumor contain tongue-like myometrial invasion reminiscent of endometrial stromal sarcoma. (B) Nests of plump epithelioid cells with abundant eosinophilic cytoplasm, and vesicular nuclei. (C) Sheets of small round-polygonal cells. (D) Occasional epithelioid cells with a tubular pattern. Immunohistochemistry showing staining for (E) calretinin, and (F) estrogen receptor.
