BIRC5 and squamous cell carcinoma: BIRC5 inhibits apoptosis‐related signalling pathways and promotes cell proliferation to affect cancer progression.20BIRC5, which encodes surviving, is upregulated in both adenocarcinoma and squamous cell carcinoma tissues, and the high expression of BIRC5 is related to poor survival in adenocarcinoma, but not squamous cell carcinoma.