The BTG3-correlated genes were involved in RNA transport, splicing and degradation, DNA replication and cell cycle, proteasomal degradation for gastric cancer, cell cycle, DNA replication, and mismatch repair, TNF and NF-κB signal pathways for lung cancer, ribosome and spliceosome, and metabolism of amino acids for breast cancer, neural diseases, viral infection, oxidative phosphorylation for ovarian cancer. Here, BTG3 is linked to gastric cancer.