D2I2.
common

Golfer's elbow

Golfer's elbow is tendinosis of the or medial common flexor and pronator teres muscle attachment on the inside of the elbow. It is similar to tennis elbow, which affects the outside of the elbow at the lateral epicondyle – a tendinopathy resulting from overload or repetitive use of the arm, causing an injury similar to ulnar collateral ligament injury of the elbow in "pitcher's elbow". A similar injury occurs in teenage baseball pitchers, and is known as Little League elbow.

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Plain-language summary adapted from Wikipedia. Not medical advice.