Molecular Classification in Mexican Patients With Endometrial Cancer and Its Impact on Prognosis

The investigators will carry out a pilot study on patients with endometrioid type EC treated between 2015-2019. Samples of patients over 18 years of age admitted to the cohort with a diagnosis of endometrioid-type EC are already collected and will be evaluated for exome sequencing (N=32) and the detection of POLE mutations. DNA will be extracted using the "DNA/RNA AllPrep" kit (QIAGEN). Verification of adequate DNA extraction will be performed by quantifying using TapeStation (Agilent). Exome sequencing (N = 32 tumor samples and 32 somatic samples [leukocytes] from the same patient) will be carried out using Illumina's Nextera Rapid Capture Exome at Azenta Life Science (NJ, USA) following preset protocols and with a depth of 100X. The alignment and detection of variants will be done with the GATX-Mutect Suite (Broad Institute, USA) and the annotation of variant filtering with ANNOVAR. The identification of hotspots will be made according to Chen study. The immunohistochemistry (IHC) for microsatellite instability and overexpressed mutant TP53 (N = 94) will be done using established IHC protocols and will include MSH2, MLH1, PMS1, PMS2, MSH6, MSH3, and TP53.

Criteria: Inclusion Criteria:

• Clinical diagnosis of endometrioid-type endometrial cancer with samples available
• That the patients have undergone surgery at INCan.

Exclusion criteria

• Samples with CEE of non-endometroid type.
• Samples from patients with double primary neoplasm, including carcinoma ductal in situ, squamous cell skin cancers, and cervical carcinoma in situ
• History of malignancy < 5 years prior with no evidence of disease (i.e., remission).