CA1 and gastric cancer: The prevalence of CA I and II autoantibodies in patients with AML in this study was 76.6% and 23.3%, respectively. The presence of autoantibodies against CA I and II has been observed in many pathological conditions, such as metabolic syndrome, recurrent pregnancy loss, acute anterior uveitis, gastric cancer, Graves’ disease, preeclampsia, and rheumatoid arthritis.