Shepherd crook deformity

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A shepherd crook deformity refers to a coxa varus angulation of the proximal femur, classically seen in femoral involvement by fibrous dysplasia, although may be seen in other disorders such as Paget disease of bone and osteogenesis imperfecta.

History and etymology

The shape of the proximal femur resembles that of the staff carried by shepherds, known as a crook.