Congenital mega colon is confirmed by:
a. Rectal biopsy(Ref: Nelson's 20/e p 1894-1897Ghai 8/e p 285-286)Congenital Aganglionic Megacolon is the other name for Hirschsprung diseaseDiagnosis of Hirschsprung disease is confirmed by rectal biopsy.
Rectal biopsy
Sigmoidoscopy
Barium enema
Invertogram
Gastro Intestinal System