Os calcaneus or anterosuperior calcaneal process fracture
28 years-old woman with history of inversion injury of her left ankle a few hours ago.
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Small bony fragment located between the anterosuperior calcaneal process and the cuboid bone.
Besides the treatment we consider that this fragment had well corticated margins, small size and regular interface, supporting the diagnosis of OS calcaneus secundarius. The differentiation of these two entities may be quite challenging in some cases and MRI imaging could help us for these one. MRI could show bone marrow edema adjacent to the fracture line.