My son had a barium test on his abdomen and it was noted that multiple nodules were found at the end of small intestine entering into the large intestine . He had a CT scan and no nodules were noted. The only thing they saw was a large amount of stool located in upper rt. colon . His symptons are abdominal pain , nausea, vomitting and fatigue. They are now saying it s constipation. This pain in abdomen has been going on for years. We have a colonosopy scheduled. Is this symptons of constipation? Why didn t the CT scan show nodules? Thanks!