With the exception of anemia (hemoglobin, 11.7 g/dL [normal range: 13.2–17.2 g/dL]), the patient’s laboratory findings ware unremarkable, including tumor marker levels such as carcinoembryonic antigen (CEA), carbohydrate antigen 19–9 (CA19-9). This evidence concerns the gene CEACAM5 and anemia (phenotype).