Analysis of a publicly available microarray dataset comprising 408 samples from 115 patients and 53 controls revealed that ROR1 transcript expression was significantly elevated in deep infiltrating endometriosis (DIE) lesions, including intestine (Estimate −0.511, 95% HPD –0.740 to −0.275), rectovaginal (−0.632, −0.883 to −0.375), and uterosacral ligament sites (−0.445, −0.670 to −0.178), as well as in superficial peritoneal endometriosis (SUP) red (−0.863, −1.112 to −0.634) and black lesions (−0.481, −0.743 to −0.259), compared to control endometrium (Figure 1A; Supplementary Table 1). This evidence concerns the gene ROR1 and endometriosis.