Hi. I too was reading on the net a few days ago that people with blood A type have higher chances of getting stomach cancer. My mother 73 years old diagnosed Jan. 07 with stage IIIB is also type A blood. Please have her in your prayers, because this thursday she's having a pet scan done because her CA 19-9 has gone up to 135 and we are praying and hoping that her cancer is not comming back. I pray that your father starts feeling better soon and for a miracle to cure this ugly disease.