M.L. Filipenko

Endometrial adenocarcinoma with mutations in POLE, TP53 genes and microsatellite instability

The molecular classification of endometrial cancer developed by The Cancer Genome Atlas project (TCGA, 2013) is currently actively used in gynecological oncology. According to it, endometrial carcinoma is divided into four molecular subtypes: POLE-mutated, MMR deficient (dMMR), TP53-aberrant and unspecified. Endometrial cancer samples belonging to the dMMR and POLE-mutant types are characterized by specific genetic profiles reflecting the hyper- and ultramutant phenotypes of the tumor. At the same time POLE-mutated endometrial carcinomas recur rarely and exhibit the excellent prognosis. Here we report the rare case of 65 y.o. female patient with endometrioid carcinoma sharing immunohistochemical and molecular features of TP53-aberrant, MMR deficient and POLE-mutated subtypes.