Infant 3 months old. Wasn t keeping her mothers milk down. GI problems from birth. Had a feeding tube surgically placed @ 6 weeks but continued to gain little to no weight or gain & then lose. 9 pounds currently. Otherwise, alert, responds well to others, holds her head up, scoots. She just can t keep weight on & has stomach pain. The GI Dr.s did a colonoscopy to look for the cause. Did a a biopsy waiting on results. They mentioned Hershbergers disease which if she has it they said they would have to do a colostomy. I looked it up but Hirshsprungs disease also sounds a lot like what they talked about as far as the definition. What is the difference in the two disorders?