Corpus colostomy

Hi, my daughter had a 2/3 corpus colostomy 6 years ago.  Sam has progressed to have many more seizures daily.  She has been on every med and has a VNS.  The docs want to perform a full colostomy on her, she is now 17.  Has anyone had any experience with this surgery?  I have read many articles, but would like to hear from someone who has actual information on this surgery.      Thank You,,,, Cheryl.