I've been gluten free for a year now and my gastro wants to wait for the endocopy until I'm eligible for the colonoscopy when I turn 50 later this year. I don't think she believes I have celiac, even though I tested positive for one of the genes associated with celiac and my primary has diagnosed me as having celiac. The gluten sensitivity blood tests came back negative, of course, since I was gluten free for 9 months at that time. Why is she waiting?
At any rate, My digestive system has improved greatly, but when I reintroduced non fat Greek yogurt in my diet, the plaques psoriasis returned on my elbows. My primary believes it is dermatitis herpetiformis (as well as I, since before going gluten free, I used to get boils in my armpits) and I'm scheduled for a skin biopsy in 3 weeks. However, I eliminated dairy from my diet 4 weeks ago and the plaques psoriasis is healing like it did when I eliminated gluten from my diet a year ago. If the scar is reduced to eczema, does that mean there still are IGA deposits in my skin?
I don't want to resume dairy since I experienced a cross reaction to the casein in cheese and found lactose was on that same list. So my question is, how long do the granular IGA deposits remain in the skin in order to have a valid skin biopsy test performed for dermatitis herpetiformis?
Since it takes 1-2 years for dermatitis herpetiformis heal on a gluten free diet and I just had a recent flare up, can I continue on my dairy free diet or should I resume eating non fat Greek yogurt for the next 3 weeks just for this skin biopsy?