How can I be sure I have celiac disease?
Blood tests can help your doctor diagnose this disease. If you think you have celiac disease, talk to your doctor. Don’t stop eating gluten before you have a blood test. If you stop eating gluten before your blood test, it can mess up your results.
If your blood test indicates that you might have celiac disease, an intestinal biopsy (taking a small piece of tissue from your small intestine using a thin tube) or the diagnosis of dermatitis herpetiformis (a skin rash) will confirm that you have celiac disease.
Source
Detecting Celiac Disease in Your Patients by HT Pruessner, M.D. (American Family Physician March 01, 1998, http://www.aafp.org/afp/980301ap/pruessn.html)
Written by familydoctor.org editorial staff
Reviewed/Updated: 10/10
Created: 03/98