The radial tuberosity (bicipital tuberosity) is the oval roughened prominence on the medial aspect of the radial neck, providing the insertion footprint for the distal biceps tendon. It faces medially and posteriorly, requiring forearm supination to face the tendon toward its footprint.
The radial tuberosity is the site of distal biceps tendon repair after rupture, where suture anchors or transosseous tunnels are placed to reattach the tendon to its footprint. The footprint faces posteriorly in full supination, so the repair requires forearm positioning in supination. Partial biceps tendon avulsions from the tuberosity are increasingly recognised on MRI and may be managed conservatively or with partial repair.
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