Hi Im brand new to this forum and so happy to find it. I hope Im posting in the right place. Im looking for anyone that has info or experience with a false negative on the Fecal Calprotectin test or something similar? My child is currently being tested for GI issues and his doctor is putting all future testing in the hands of this test and Im uneasy about relying on one test.
Backstory: I myself was diagnosed with Crohns disease a few months ago at age 34, its been something Ive always dealt with and was labeled IBS/anxiety. It has not always been easy for me, but thankfully so far my flares have been mild-moderate. After several tests and finally seeing a GI who immediately ordered endoscopy/colonoscopy followed by the pill endoscopy- I now had a name for it- and although still in a flare Im having some success with Pentasa and just finished a round of Entocort/Uceris for partial obstructions.
All of my focus however is aimed towards my 7 year old. We have been working with a pediatric GI who is considered one of the best here and I do like him, but Im considering getting a second opinion from a different GI group. My 7 year old has suffered from a few years of off and on- constant diarrhea, horrible abominable pain, losing stool at school/playing/etc. and has gained NO weight in over a year. He has fallen off the growth chart for his age and keeps dropping. What scares me is that his symptoms started exactly as mine did, the exact same age as mine did- as a lactose intolerance in kindergarten. His GI will not test invasively, scope, etc. unless he gets a "green light" from certain tests- something showing inflammation in the stool, especially the Fecal Calprotectin test and my son has received normal results on that. The only non invasive test that came back positive was a strong positive on the hydrogen breath test testing for lactose. At this point his diarrhea and pain is somewhat being managed because we have cut out all lactose, BUT he is still is not gaining weight (which is not indicative of lactose intolerance) and his stool is still not perfect. My GI (he does not treat my son) advised finding someone to scope him because of where MY ulcers and crohns is and how my disease presented. i have shared all my records with his GI. I just struggle with getting that 2nd opinion and possibly putting him under and doing these procedures when his doctor does not believe we need to and wants to avoid the risk, and wants to label him IBS for now. Im battling putting him through an ordeal/risk when he may not need it, but I just can't shake my own personal knowledge of this disease and the fact that I too would get a positive hydrogen breath test- because of the damage done by Crohns.
So my question is- have any of your children ever had a negative result on the Fecal Calprotectin test or not shown WBC in their stool, etc. and then found out they DID have an IBD disease? Is it a test worth challenging?
Thank you so much. Im very grateful for any advice.