Had surgery to remove part of colon at age 3 for hirshprungs. i had bowel obstruction. how to find it is due to scar tissue or hirshprungs w/o surgery?

Enema and/or Biopsy: Biopsies are usually done before Hirschsprung's disease surgery to ensure that all affected segments are removed. You might indeed have scar tissue or adhesions resulting from your surgery. A contrast enema could help identify areas prone to obstruction. This enema may also identify aganglionic Hirschsprung's sections that may need biopsy before further surgery. GI consultation may be helpful.