 The last well-formed disk space is referred to as L5-S1. There is a well-circumscribed heterogeneous T1 and high T2 signal lesion in the right iliac bone measuring 12 x 8 mm with an apparent tract extending to the inner cortex of the iliac bone toward the right SI joint space, better visualized on earlier CTs. On prior CT, it has a sclerotic margin and appears to have benign features. It is stable dating back to 11/22/2009. There is normal alignment of the spine with normal osseous marrow signal and vertebral body heights. There is dessication of L4-5 and L5-S1 disks with mild loss of height at L4-5 and moderate loss of height at L5-S1 disks. The conus shows normal signal and caliber, terminating at L1-2.T12-L1: No disk herniation or spinal stenosis.L1-2: No disk herniation or spinal stenosis.L2-3: No disk herniation or spinal stenosis.L3-4: Minimal disk bulge, mild posterior epidural fat prominence and mild bilateral facet arthropathy causing no significant spinal canal or neural foraminal stenosis.L4-5: Mild disk bulge, facet arthropathy causing no significant spinal canal or neural foraminal stenosis.L5-S1: No spinal stenosis or disk herniation.
Mild multilevel spondylotic changes with no significant spinal stenosis at any level in the lumbar spine.