I would definitely follow up on that as shortened villi can be a sign of celiac. However I don't know if there is some normal level of shortening that you can see that is sub-clinical. Like is there some range that is normal, some range that is shorter than normal, but may just be anatomical variation and not from a disease and then even shorter than that that is where you call it disease.There are a lot of things that have a "normally abnormal" range if that makes any sense. Like if normal range (set by average +/- 2 standard deviations--so includes ~95% of all healthy controls) is lets make up numbers from 10-12. It may be if you check only diseased people you find they are 3-7. So a value of 8 or 9 is "not normal" but also isn't low enough to be a definite sign of disease and sometimes you find healthy people with that value. I had that with a blood sugar measurement not too long ago. The number was out of the "normal value" range, but wasn't into a range that is typical of disease and so they called it "sub clinical" meaning I'm just at least at that time an outlier of the 95% of people who would fall in the range, but the number wasn't in the range where you see disease.