Hi tall girl,
Not sure if I can help you, but my daughter had an abscess at her TI as well last December. The treatment laid out was to have a CT guided drain, and a drain line left in for about a week. Then Flagyl followed for about a month. She has regular follow-ups as there is still a small fistula there. She will be having an SBFT in about a month to see the state of things. I'm no expert, but I would inquire about other treatment options before resorting to resection. Good Luck with it.