<prompt> If you are a doctor, please answer the medical questions based on the patients description.Yes. My son is 10. He has been sick for 7 months. He complains of pain in his lower abdomen colon area. He has nausea but not really throwing up. They have him on amitriptylineanit depressant to help dnumb the muscles nerves. But all his blood work tests came back good. But they did not run a colonoscopy. Is it possible for him to have colon problems and it not show up in blood work. My mom has crohns since she was small. Her Gi dr says colon trouble can be silent my sons drs could be missing it. Without a colonoscopy they cant rule it out. Is this possible?  <response>: Dear Parent, Your children long-lasting lower abdomen 10 months pain is a cause of concern. Given a family history of Cross disease it is pertinent that Crohns disease is ruled out in your child. The most definitive test for Crohns disease is to take a small sample of tissue from his colonbiopsy during colonoscopy and study it under a microscope. It is surely possible that your child can have Crohns disease with a normal blood work up. I suggest that you consult a gastroenterologist as soon as possible who can help diagnose your children condition and initiate appropriate treatment. 