I have had my IgM Anti-Cardiolipin tested 3 times in the past 6 months. Results have been, 22, 35.5 and last week was 53. I know the normal range is between 0-10 but what exactly does IgM Anti-Cardiolipin mean? I am under a Haematologist at Manchester who has been really good so far but I am still baffled when he explains things to me. Is this the blood test that confirms APS or do I need to have other positive blood tests to have APS. Can anyone shed any light please. Many thanks.