That high levels of CEA expression can be observed in many different tumor entities is consistent with data summarized in The Cancer Genome Atlas (TCGA) database (www.cancer.gov, data available from https://www.proteinatlas.org/ENSG00000105388-CEACAM5/summary/rna, accessed on 21 November 2024). This evidence concerns the gene CEACAM5 and neoplasm.