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Abbreviations: ER, estrogen receptor; FIGO, International Federation of Gynecology and Obstetrics; GIST, gastrointestinal stromal tumor; IHC, immunohistochemistry; LMS, leiomyosarcoma; PD‐1, programmed cell death protein 1; PD‐L1, programmed death‐ligand 1; STS, soft‐tissue sarcoma; uLMS, uterine leiomyosarcoma; UPS, undifferentiated pleomorphic sarcoma.
