Although several studies have highlighted the role of GPR55 in various types of cancer (Andradas et al. 2011; Pineiro et al. 2011; Perez-Gomez et al. 2013; He et al. 2015; Hofmann et al. 2015), there have been no studies (to our knowledge) on the expression of GPR55 and its potential role in EC. Here, GPR55 is linked to cancer.