CHI3L1 and endometrial cancer: HE4 (human epididymis protein 4), together with other serum biomarkers, such as CA-125, CA724, CA19-9 [84,85,86], and YKL-40, also known as chitinase-3-like 1 protein (CHI3L1) and DKK-3 [87], can contribute to the detection and monitoring of endometrial cancer.