The medial surface of the radial neck and tuberosity has a smooth groove adjacent to the bicipital tuberosity where the biceps tendon footprint ends and the tuberosity margins transition to the radial neck. This groove accommodates the bursal tissue of the bicipitoradial bursa during forearm rotation.
The bicipital tuberosity groove is relevant in distal biceps tendon repair where the exact footprint location on the tuberosity determines tendon tension. Partial biceps avulsions may involve only the medial groove aspect of the footprint. In forearm rotation, the bicipitoradial bursa glides in this groove, and bursitis from repetitive supination/pronation produces pain at the radial tuberosity.
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