John,

I'm not intellectually prepared to argue this point, but that sounds like an issue that may require some followup work. While a fistula can be a leak, I don't think it is a good idea for you to wait for the flesh to fuse together. I had a minor fistula, but it was a draining wound. It was opened and allowed to heal from the inside out. It sounds like you have an actual opening that should be looked at. You know, closed on the inside. Just a thought.

Glenn