I am NOT a medical professional, but having gone through a potential scleroderma diagnosis, what I have been told by many doctors is that doctors may consider blood test results when determining if a patient has scleroderma, but the patient must also have physical or systemic symptoms that would lead to that diagnosis. There are several blood tests that are relatively, but not 100%, specific for scleroderma. I, for example, have a high ANA and a titer pattern that often goes with scleroderma.