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Avascular necrosis of scaphoid

The scaphoid receives blood supply from the distal branches of radial artery, primarily to the mid and distal poles. The proximal pole receives retrograde blood supply. The peculiar blood supply of the scaphoid means, on the slightest hint of vascular compromise, the proximal pole is most susceptible to ischemia. The fracture in this instance enables the vascular compromise to happen. 

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