trying to find answer/diagnosis for son's abd. pain. abdominal pain, bloating, pain on right side, nausea, fatigue, constipation. gall bladder removed at age 11, diseased nonfunctioning at zero percent. ct abd and pelvis showed a large amount of stool, colonoscopy showed blister like lesions, hyperplasia and hyperlymphadenopathy, egd showed mild gastritis and inflammation of the stomach. allergy testing (foods) all negative. question of valid test due to no reaction to antihistimine. neg for celiac disease. no set pattern to symptoms. does not seem food related. is currently on pepcid 30 qd, carafate 10 tid, flaygl x 7 days. labs had been normal. checking stool now.  any suggestions. my son is 13 years old, 108 pounds down from 112.