What is the name of this condition?

Someone I know has a condition relating to his testicles and scrotum, and I was trying to find out more information about it, but I can't remember what it was called. Please be mature with your answers, this is a serious question.

Basically, what happens is one of his testicles will go up into his body extremely far - he was rushed to the ER in an ambulance because one of his testicles was inside his body as a visible lump diagonally above his hip. It hurt him to move, he ended up passing out from the pain.

The doctor in the ER pushed the testicle back down into the scrotum while he was unconscious. He then saw a specialist, who said his testicles weren't properly attached to the scrotum (or something to that effect) and that is why they're able to go up abnormally far into his body. It was recommended that he have surgery to attach his testicles to his scrotum so it won't happen again.

Does anyone have any idea what this condition, and the surgery to correct it, is called? Thanks in advance for any help!