CHI3L1 (non‐enzymatic chitinase‐3 like‐protein‐1) is a kind of the glycoside hydrolase family 18, which is synthesized and secreted by various cell types, including immune‐related cells, fibroblast‐like cells, smooth muscle cells, and tumor cells [35, 36]. The gene discussed is CHI3L1; the disease is neoplasm.