Fig. 2

Ribbing disease. Lateral radiograph of right tibia a shows smooth thickening along the anterior cortex; this radiograph was obtained when the patient was 19 years of age. 7 years later, a follow-up lateral radiograph obtained as a young adult b shows further increased thickening along the anterior tibial cortex with narrowing of the medullary cavity. Axial c and sagittal d PD MR images of the tibia obtained at the same time as the second radiograph reveal smooth cortical thickening anteriorly. No unusual abnormal uptake of radiotracer was noted on the concomitantly performed Tc-99m MDP labeled bone scan e