Indeed, in endometriotic lesions, the levels of IFN-γ and IL10 and the ratios of IL4/IFN-γ, IL4/IL2 IL10/IFN-γ, and IL10/IL2 are significantly elevated in the peritoneal fluid of endometriosis patients compared to healthy controls (238, 275). The gene discussed is IL10; the disease is endometriosis.