Transcript for Young Athletes With ACL Injuries on the Rise
This is world news beyond the headlines when doctors are looking to repair an ACL injury and -- a child. They don't look at the -- They look at the risks to figure out how much -- is left did look at something called growth plates. As -- -- he's growing the -- isn't fully fused so what does it look for here. Here you can see that the pistol radius in this only -- plates are open the carpal bones here are starting this to take shape. All the pro plates in the fingers are open and there's not a -- incest when -- a little important moment that we used to characterize growth. In girls that shows up at age eleven soon. This girl is still growing city approach to the repair for -- he's different than it would be in an adult. For Yahoo! News and ABC news I'm -- rich investor you can follow me on Twitter at doctor Richard --
This transcript has been automatically generated and may not be 100% accurate.