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Bilateral AP lower extremity radiographs demonstrate right genu varum and degenerative narrowing of the medial tibiofemoral joint space. Bilateral sinusoidal pattern of osseous thickening and thinning involving the bilateral tibia, fibula and to a lesser degree the femur. Subtle lamellated periosteal reaction evident at some sites of thickening. The contour has a wavelength of approximately 15 cm. No intramedullary abnormality.