It was also found that a regression model consisting of CD44 and TGM2 discriminated endometriosis from control samples with high accuracy (Fig. 4f, Table 3, AUC 0.98, 95% CI 0.85–1.00, p < 0.001), however this result needs to be considered as preliminary due to the small number of endometriosis samples. This evidence concerns the gene TGM2 and endometriosis.