Zachary is a four-year-old boy who was born with Hirschsprung’s disease, a serious illness that affects the large intestine.

Normally, muscles in the intestine push stool along so that it can be evacuated. Special nerve cells in the intestine stimulate the muscles to push. Children with Hirschsprung’s disease do not have these nerve cells in the last part of the large intestine, which leads to backing up of stool and severe intestinal obstruction.