Fig. 11.

On initial examination, a sagittal and b parasagittal T1-weighted, c sagittal and d parasagittal T2-weighted MR images of the lumbar spine do not demonstrate any obvious abnormality. e, f The radiographs, however, show classic pagetic changes of the L1 vertebra (dashed arrows) including vertebral expansion, sclerosis and cortical thickening. Review of the MRI shows some minor increased signal in the expanded L1 vertebral body on both T1 and T2 parasagittal images, suggestive of fatty marrow change (white arrows)