We found that the proportions of CD8+ T cells and CD56+ NK cells were significantly higher in the eutopic endometria of women with endometriosis than in women with normal endometria (0.2292 ± 0.0591 vs 0.1790 ± 0.0562, P = 0.0132; 0.1686 ± 0.0745 vs 0.1163 ± 0.056, P = 0.0227; Figures 5A, B and Table 3), while CD163+ macrophages were lower in the eutopic endometria of women with endometriosis compared to their counterparts (0.1774 ± 0.0685 vs 0.2555 ± 0.0588, P = 0.0003; Figures 5A, B and Table 3). This evidence concerns the gene NCAM1 and endometriosis.