[savemylife]

OP here. No, but many years ago I did have what I think was called a "lower GI series", where they pump you full of barium and take X-rays of your digestive tract. Yeah, that was really pleasant. I think the idea was to look for blockages. There was no biopsy taken, ever.

[m0shen]

From the experience in my family I would say inquire about one. A family member had many blood tests for a mystery illness, some of which were ambiguous for Celiac. The only definitive tests were done via biopsy and visual inspection of the colon.

The damage was so severe that a section of colon had to be removed.