The blood test results were so clear that no tissue samples were needed
I am grateful that our pediatrician didn’t give up and kept looking into things: “If something is wrong, we’ll find out what. We're not just going to say ‘her belly ache is probably psychosomatic.’ We’re going to keep digging.”
Along with other tests, they checked certain antibody levels in the blood that are higher in people who have celiac disease. And they saw that those levels were over ten times higher than normal! The diagnosis was then so clear that they didn't even need to take a tissue sample from the small intestine.