When we investigated the correlation of alteration of the BCNP1 copy‐number changes and mutations in several cancer types using TCGA data sets, we concluded that BCNP1 is highly altered in some of the cancer types and that BCNP1 copy‐number changes and mutations co‐occur with other molecular alteration events for TP53, PIK3CA, MAPK1, KRAS and AKT2. This evidence concerns the gene PIK3CA and cancer.