 The vertebral body heights and intervertebral disk spaces are preserved. Previously demonstrated low T1 marrow signal in the lumbar vertebrae has been replaced by fatty marrow. There is residual low T1 signal intensity in the visualized lower thoracic vertebrae. These findings are favored to represent changes related to interval radiation. There are no focal osseous lesions. There is persistent mild thickening of the cauda equina without appreciable enhancement. The visualized distal cord is normal in morphology and signal intensity. There is mild nonspecific posterior subcutaneous edema over the lower lumbar spine.
1. Persistent mild thickening of the cauda equina without appreciable enhancement.2. Fatty replacement of lumbar vertebral bone marrow likely related to interval radiation.