For endometriotic lesions, the NK1R, RAMP-1, and CRLR staining levels were significantly higher in DE lesions than OE lesions, even after the adjustment for age, menstrual phase, parity, presence or absence of adenomyosis, and presence or absence of uterine fibroids (all p-values < 0.008). The gene discussed is TACR1; the disease is adenomyosis.