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10 cm long "occlusion" of the brachial artery as it passes over the distal humeus to its bifurcation into radial and ulnar arteries. No contrast leak to indicate active bleeding. Large haematoma in the soft tissues of the lower anterior arm just above the cubital fossa associated with an impaction fracture of the posterior capitellum with impaction along the lateral border of the radial head. Appearances indicate divergent dislocation of the radius with rotation (and spontaneous reduction). Degree of disruption to soft tissues associated with this injury is evidenced by the marked haematoma. CT angiogram repeated in 4 hours showed similar vascular occlusion.