<<Disclaimer: Verify this information before applying it to your situation.>> Hello All- My four year old son was diagnosed and biopsy proven two years ago. My = eight year old niece is now showing symptoms. She was just released from the hospital where she spent four days getting every test possible = performed on her. They did test for Celiac when she was first admitted = but today they said it came back negative. She was in the hospital earlier this month for the same reason: She vomits until she is nearly = convulsing! Has anyone ever heard of anyone who had negative blood tests, but then underwent a biopsy and were diagnosed as a Celiac? I am = trying to gather this info. for my sister. I think she should request a = biopsy to be safe. Her symptoms are identical to my sons. Lots of vomiting, often nauseated, shorter than average, super thin and pale. If = you've ever heard of someone with negative blood tests and a positive = biopsy please let my know. Thank you Cindy