Megacolon, not elsewhere classified

**Inclusion terms:** - Dilatation of colon

**Excludes1:** - congenital megacolon (aganglionic) (Q43.1) - megacolon (due to) (in) Chagas' disease (B57.32) - megacolon (due to) (in) Clostridium difficile (A04.7-) - megacolon (due to) (in) Hirschsprung's disease (Q43.1)

**Code first:** - , if applicable (T51-T65) to identify toxic agent