Medial epicondyle fractures are common injuries of children typically between 9 and 14 years old. These injuries can occur in isolation but 60% are associated with elbow dislocations.
The medial epicondyle is an apophysis (a second growth center) of the distal humerus and begins to ossify between 5-7 years of age. It is the origin site of the flexor-pronator mass of the forearm, as well as the ulnar collateral ligament (the most important valgus stabilizer of the elbow). It is the last physis of the distal humerus to undergo fusion (around age 15) and is at risk of fracture during high valgus stresses to the elbow.
Full Article - https://www.orthopaedia.com/pediatric-fractures-of-the-upper-extremities/#Medial-epicondyle-fractures
