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Occult acute fractures. Peroneal malleolus fracture. a, b Conventional (a) and colour Doppler (b) coronal US obtained over the inferior fibula (Fib). c, d Coronal 2D (c) and 3D (d) reconstructed CT of the ankle. Previous standard radiographs were normal. a US shows an non-displaced fracture (arrow) of the fibula and hypoechoic thickening of the periosteum (arrowheads) that shows hypervascular changes at colour Doppler (b). c, d CT confirmed the US findings
