The other two endometriosis-derived cell lines (iEc-ESCs, and tHESCs) were as invasive as MDA-MB-231 and EM-E6/E7/TERT using the gold standard of transwells, were similar to the bone chondrosarcoma cell line SW1353 when tracking invasion using spheroid droplets, and in the self-assembly assay, showed more invasive behaviour than SW1353. Here, TERT is linked to endometriosis.