If any of you are aware of other studies, please comment below. Breast cancer Caucasians with blood type A may have a higher risk of breast cancer than other Caucasians. No association was found in any other blood type or any other population. Similarly, the Rh factor had no association with the risk of breast cancer. Gastric cancer Blood groups A and AB are associated with increased gastric cancer risk: evidence from a large genetic study and systematic review https://bmccancer.biomedcentral.com/articles/10.1186/s12885-019-5355-4 Leukemia Lung cancer Ovarian cancer A study at Harvard University found that women with AB or B group blood have a raised risk of developing ovarian cancer. https://www.rhesusnegative.net/staynegative/blood-types-cancer-risks/ Pancreatic cancer Skin cancer Stomach cancer To be continued…