NFKB1 and endometriosis: For example, when the endometrial samples from normal controls, including normally-located entopic endometrium from endometriosis patients and ectopic (outside of the normal location) endometrium, were analysed for expression of ICAM-1 and NF-κB, the ectopic endometriotic tissue had significantly higher levels of both molecules than entopic endometrium [95].