The expression of DIAPH3 was observed to be negatively correlated with common immune checkpoints in testicular carcinoma and cytotoxic T-lymphocyte associated protein 4 (CTLA4), hepatitis A virus cellular receptor 2 (HAVCR2), lymphocyte-activated gene 3 (LAG3), programmed cell death 1 (PDCD1), and T cell immunoreceptors with Ig and ITIM domains (TIGIT) in cervical cancer. This evidence concerns the gene PDCD1 and cervical cancer.