Hi, Before I explain you the meaning of the report, I would like to give some anatomical details. The vertebral column consists of vertebrae. The bodies of vertebrae are separated with disk-shaped cartilages. The posterior elements of the vertebrae comprise a canal where the spinal cord is located and is surrounded with a multilayer coating called thecal sac. There are also little holes on both sides of the vertebral column through which nerves originating from the spinal cord exit (neural foramina). The whole vertebral column is reinforced with tough ligaments both in the anterior and the posterior aspects. These ligaments are called anterior and posterior longitudinal ligaments, respectively. Each vertebra is marked with a letter that corresponds to the anatomic region of the body: C means cervical, T or Th means thoracic, L means lumbar, S is sacral. Now, back to your report. The reports says that your L4/L5 disk-shaped cartilage lost its wateriness and is drier. The height of the disk is reduced. It bulges back into the spinal canal and causes narrowing of the canal L5/S1 disk is also partially lost its wateriness. It also bulges into the canal and moves the thecal sac towards the spinal cord. It also narrows both neural foramina. That is it. Hope this helps. Kind Regards,