Most of the players who play baseball in their adulthood have undergone a lot of throwing exercise since their childhood. As is well known, the medial epicondyle of humerus, where flexor digitorum group and ulnar collateral ligament are attached, is especially vulnerable to excessive stress from throwing. Therefore, taking notice of various findings discovered through the X-raying of patients who visited our hospital because of baseball elbow. The relationship between the cause and the present status has been analyzed in this study.
