## Galeazzi Fracture: Definition and Key Features **Key Point:** A Galeazzi fracture is a fracture of the middle or distal third of the radius with disruption of the distal radioulnar joint (DRUJ), typically manifesting as dorsal displacement or dislocation of the ulnar head. ### Definition Galeazzi fracture = **Radial shaft fracture + DRUJ disruption** This is also known as a "reverse Monteggia" because: - Monteggia: ulnar fracture + radial head dislocation (proximal injury) - Galeazzi: radial fracture + ulnar head dislocation (distal injury) ### Anatomical Basis **High-Yield:** The DRUJ is stabilized by: 1. The triangular fibrocartilage complex (TFCC) 2. The interosseous membrane 3. The radioulnar ligaments When the radius fractures, particularly in the distal third, the force disrupts these stabilizers, causing the ulnar head to subluxate or dislocate dorsally (most common) or volarly. ### Clinical Presentation - Wrist swelling and deformity - Prominence of the ulnar head on the dorsal aspect of the wrist - Loss of pronation/supination - Tenderness over the DRUJ **Clinical Pearl:** The DRUJ disruption may be subtle on initial radiographs. A true lateral view of the wrist is essential to detect ulnar head displacement. If the radial fracture is treated without addressing the DRUJ, chronic instability and pain result. **Mnemonic:** **GALEAZZI = Radius fracture + Ulnar head dislocation (Distal)** 
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