CHI3L1 and cancer: The results indicated that the C0 CHI3L1+ subtype was mainly enriched in biological processes such as response to oxygen levels, response to decreased oxygen levels, response to hypoxia, cell-substrate adhesion, and cell growth, and was associated with pathways including proteoglycans in cancer, ECM-receptor interaction, cytoskeleton in muscle cells, focal adhesion, and HIF-1 signaling pathway.