Another limitation is the descriptive nature of these results, but it is important to emphasize that the current literature presents contradictory findings regarding several of the studied markers (e.g., EGF, MIF, IL-6, IL-8, TNFα, CGRP) in endometriosis and none of them were studied in deep-infiltrating endometriosis lesions before. The gene discussed is CXCL8; the disease is endometriosis.