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Annotated lateral view of the carpus. The ‘spilt tea cup’ sign can be seen (in red) as the lunate is rotated and displaced volarly with respect to the radial articular surface, with subsequent loss of colinearity (line C) where the lunate does not lie on the collinear axis. The scapolunate angle (D) is abnormal (normal range 30–60°), and the hamate and lunate overlap.
