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What about repeat biopsies vs. serology and gluten challenges?
http://www.celiac.com/articles/18/1/What-about-repeat-biopsies-vs-serology-and-gluten-challenges/Page1.html
Scott Adams

In 1994 I was diagnosed with celiac disease, which led me to create Celiac.com in 1995. I created this site for a single purpose: To help as many people as possible with celiac disease get diagnosed so they can begin to live happy, healthy gluten-free lives. Celiac.com was the first site on the Internet dedicated solely to celiac disease, and since then it has become an invaluable resource to people worldwide who seek information about celiac disease and the gluten-free diet.

In 1998 I created The Gluten-Free Mall, Your Special Diet Superstore! which was also another Internet first—it was the first gluten-free food site to offer a shopping cart-style interface, and the ability for people to order gluten-free products manufactured by many different companies at a single Web site.

I am also co-author of the book Cereal Killers, and founder and publisher of Journal of Gluten Sensitivity.

 
By Scott Adams
Published on 07/26/1996
 
There are different practices amongst GIs on repeat biopsies vs. serology, and on gluten challenge

There are different practices amongst GIs on repeat biopsies vs. serology, and on gluten challenges. My sons g/i, for example, took the position that since my sons symptoms stopped on a gluten-free diet, and his previously sky-high EMA and ARA went back to normal, that it was unnecessary to do either a repeat biopsy or a gluten challenge. From the celiac list correspondence, I now see that my GI is rather liberal.**

Vijay Kumar, M.D., Research Associate Professor at the University of Buffalo and President and Director of IMMCO Diagnostics: I think your sons GI is doing the right thing. That is, if the EMA, ARA are normal (<1:2.5) and he is on a gluten free diet then there is no need to perform biopsy studies. The previous studies relating the EMA to biopsy studies tend to confirm this impression.