What are the medical criteria for a fighter pilot?

My son have a scar in the upper abdominal area which was as a result of a proceedure done to him to correct a intestenal strangulation during his childhood when he was a 5 month old baby. this scar is about 4-5 inches long . now he is a 19 year old lad. will this have any ill effects for him being able to be considered as a fighter pilot or be pronouced medically unfit or unsuitable for the job?