MUC16 and endometriosis: Anti-endometrial antibodies studied by R. Gajbhiye et al. [22] had showed higher sensitivity (63–76%) and specificity (≥80%) for the diagnosis of US-negative endometriosis than CA-125 (76% and 60%), CA-19-19 (73% and 56%), intercellular adhesion molecule (sICAM)-I.