URMC / Encyclopedia / Content Search Encyclopedia Problems Affecting the Lower Digestive Tract There are many problems that may affect the lower digestive tract that require clinical care by a physician or other healthcare professional. Listed in the directory below are some, for which we have provided a brief overview. Constipation Encopresis Hirschsprung's Disease Irritable Bowel Syndrome Intussusception Intestinal Malrotation/Volvulus Pyloric Stenosis Meckel's Diverticulum