CBX4 and lung adenocarcinoma: Firstly, we analyzed the expression of eight CBX family members, namely CBX1/HP1β, CBX2, CBX3/HP1γ, CBX4, CBX5/HP1α, CBX6, CBX7, and CBX8, in selected solid tumors and relevant normal tissues using the TCGA data for liver hepatocellular carcinoma (LIHC), lung adenocarcinoma (LUAD), pancreatic adenocarcinoma (PAAD), and uterine endometrial carcinoma (UCEC).