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Exclusion of several histologic variants of leiomyoma, as well as atypical smooth muscle tumors (so\u2010called \u201csmooth muscle tumors of uncertain malignant potential\u201d), has highlighted that the vast majority of leiomyosarcomas are high\u2010grade tumors associated with poor prognosis even when apparently confined to the uterus. Low\u2010grade endometrial stromal sarcomas are indolent tumors associated with long\u2010term survival. High\u2010grade endometrial stromal sarcomas and undifferentiated endometrial sarcomas behave more aggressively than tumors showing nuclear uniformity. Adenosarcomas have a favorable prognosis except for tumors showing myometrial invasion or sarcomatous overgrowth. The prognosis for carcinosarcomas (which are considered here in a postscript fashion) is usually worse than that for grade 3 endometrial carcinomas. Tumor stage is the single most important prognostic factor for uterine sarcomas.<\/jats:p>","DOI":"10.1002\/ijgo.12613","type":"journal-article","created":{"date-parts":[[2018,10,11]],"date-time":"2018-10-11T03:48:35Z","timestamp":1539229715000},"page":"51-58","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":201,"title":["Uterine sarcomas"],"prefix":"10.1002","volume":"143","author":[{"given":"Nomonde","family":"Mbatani","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology Groote Schuur Hospital\/University of Cape Town Cape Town South\u00a0Africa"},{"name":"South African Medical Research Council\/University of Cape Town Gynaecological Cancer Research Centre (SA MRC\/UCT GCRC) Cape Town South Africa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander B.","family":"Olawaiye","sequence":"additional","affiliation":[{"name":"Department of Obstetrics, Gynecology and Reproductive 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