Sagittal T1-weighted fluid-attenuated inversion recovery (FLAIR) MRI with contrast of the lumbosacral junction. Sagittal T1-weighted fluid-attenuated inversion recovery (FLAIR) MRI with contrast of the lumbar spine demonstrating fatty replacement at the L5 vertebral body and sacrum (red arrows) with postoperative scarring within in the subcutaneous tissues, paraspinal muscles, and sacrum (blue arrows).