In line with this, alterations in cytidine deaminases like the apolipoprotein B mRNA‐editing catalytic polypeptide‐like (APOBEC) family of enzymes or activation induced cytidine deaminase (AID) are also frequently observed in specific cancer contexts, and their dysregulation or aberrant activity results in GIN [76, 77]. The gene discussed is AICDA; the disease is cancer.