It stinks to have to go back on the poison ... but you'd hate to waste a good biopsy with questionable results. And, yes, as far as blood tests... 3-4 weeks COULD make a difference. The data on that is pretty clear. The doctors should know about this... but it is a common pitfall.

Of the various antibodies relating to gs/cd... I've heard the antigliadin IgG antibodies are the earliest to show up and the last to go away...so that just might make sense that that is all you were left with. You are lucky that your doctor included the antiglidian antibodies in the test panel. I'll give him that much. Too many doctors are excluding them, and yet... sometimes, plenty of times, they are the only antibody present.

It will be interesting to see if you notice any changes when you put gluten back in your diet. Sometimes people who really didn't think they were symptomatic... become symptomatic when 'challenging'. Other times... not!