Guideline for the diagnosis and grading of HAEC from grade I (possible HAEC) through grade III (severe HAEC) based on clinical history, physical examination, and radiographic findings. This figure is not intended as a scoring system, but rather a decision-support tool to ensure that all of the relevant history, examination and radiographic findings are considered. In general, presence of higher grade findings should prompt providers to assign the higher grade. (HAEC: Hirschsprung-associated enterocolitis, DRE: digital rectal examination).