Endometrial stromal tumour
Endometrial stromal tumours are a type of mesenchymal tumor of the main body of the uterus.{{cite book|title=Female genital tumours: WHO Classification of Tumours|url=https://publications.iarc.fr/Book-And-Report-Series/Who-Classification-Of-Tumours/Female-Genital-Tumours-2020|year=2020|editor=WHO Classification of Tumours Editorial Board|publisher=International Agency for Research on Cancer|location=Lyon (France)|edition=5th|volume=4|isbn=978-92-832-4504-9|chapter=6. Tumours of the uterine corpus|pages=245–308}} Types include endometrial stromal nodule, the distinct low and high-grade endometrial stromal sarcomas, and undifferentiated uterine sarcoma.{{cite book |last1=Howitt |first1=Brooke E. |last2=Nucci|first2=Marissa R.|editor1-last=Zheng |editor1-first=Wenxin |editor2-last=Fadare |editor2-first=Oluwole |editor3-last=Quick |editor3-first=Charles Matthew |editor4-last=Shen |editor4-first=Danhua |editor5-last=Guo |editor5-first=Donghui |title=Gynecologic and Obstetric Pathology|volume= 2 |date=2019 |publisher=Springer |location=Singapore |isbn=978-981-13-3018-6 |pages=1–52 |url=https://books.google.com/books?id=hRegDwAAQBAJ&pg=PA1 |language=en |chapter=6. Tumours of the uterine corpus}}