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A father brings in his 11-year-old son for medial elbow pain. The boy is the star player (and often the starting pitcher) on his little league team, and Dad is the coach. The team is in second place and there are just a few more games until playoffs. At first, the boy had medial elbow pain only at the end of the game, but lately his elbow hurts after the first throws, and he is not pitching as accurately as he had been before. On physical exam, he is tender at the medial epicondyle. On your preliminary read of the xray, there is no fracture, dislocation, and the expected ossification centers are all present. 

Which of the following is true?