A dataset of molecular classification of endometrial cancer of Chinese Population, China 2020–2021.

Of the 240 patients diagnosed with newly diagnosed ECs at PKUPH from January 2020 to December 2021, 229 patients whose pathology was confirmed as EEC or SEC by histology were retrospectively analyzed. Formalin-fixed paraffin-embedded (FFPE) tissue was collected from the 229 EC patients.

Clinical information obtained from hospital records included age at diagnosis, surgical stage, and disease status. The patients were staged according to the International Federation of Gynecology and Obstetrics criteria. Tumor grade, histologic subtype, depth of myometrial invasion, and lymphovascular invasion were reviewed by a gynecologic pathologist based on the 2020 World Health Organization criteria.