EGFR and endometrial cancer: A study in endometrial cancer cells has shown that GPER mediates estrogen‐stimulated induction of ERK‐1/MAPK and −2 and phosphatidylinositol‐4, 5‐bisphosphate 3‐kinase (PI3K)/AKT, followed by transactivation of the epidermal growth factor receptor (EGFR) as represented in Figure 2 (Kozieł and Piastowska‐Ciesielska 2023; Mungenast and Thalhammer 2014; Petrie et al. 2013).