Neutering

Has anyone ever had to have exploratory surgery when having your puppy neutered? I purchased my puppy last Friday and I took him to the Vet. to arrange for the neutering and he said that Bijou will have to have a more serious surgery than just a simple neutering. Has anyone else had to go through this? I guess this would have definitely disqualified him for show/stud purposes. Please help. He is due for surgery on August 18th.