All of the muscles that flex the wrist and fingers as well as rotate the hand to a palm down position attach on the inside (medial) portion of the elbow. When these muscles contract, they can fracture the bone where they attach. This is very common in little league baseball, thus the term “Little Leaguer’s Elbow”. The area that is fractured is not responsible for growth but is key for stability, strength, and normal function of the elbow.
For a split second all of the force during the throwing motion is isolated to this area no bigger then a quarter. Excessive force or excessive repetition of non excessive force can lead to the detachment of the growth center.
Most of these injuries do not require surgery, however, many do. The surgery is usually in the form of pins or screws, but the recovery is normal or very near normal.
The most dangerous risk in this injury is the risk of missing it. If displaced and unrecognized, injury to this area of the elbow can be devastating in the long term.