Sorry I don't have personal experience with a hernia like that. But, I've had my DD go through surgery for a abdominal wall defect called Gastroschisis (her story is the link in my signature, I wouldn't google-image it unless you're prepared for something really gory! lol).

It looked like she needed a hernia operation for a while but her stomach is fine. Her surgeon said it's a very simple operation with only a few stitches.
Good luck and I hope someone can help out with your questions.

xox