As a result, our lncRNA classification of EEC is composed of 3 molecular subgroups: (1) basal-like, which is similar to the basal-like subtype of breast cancer, (2) CTNNB1-enriched, which is similar to CTNNB1-mutated subtypes of hepatocellular carcinomas, and finally (3) luminal-like, which is similar to the luminal-like subtype of breast cancer. Here, CTNNB1 is linked to breast cancer.