MRI
Multilevel extramedullary intradural/intrathecal cystic lesions scattered in the entire spinal canal but predominantly in the lumbar region, demonstrated high signal intensity on T2/STIR and some of the cystic lesions demonstrated T1 rim hyperintensity and high signal intensity changes in the conus medullaris probably from mass effect or inflammatory response.
Soft tissue enhancement with an abutment to the dorsal aspect of the spinal canal with posterior element changes most likely postoperative changes.