Hi, I will put your MRI results in layman s term. You will then ask additional questions if something is not clear. First of all, I would like to give some anatomical information so that you have a better idea on the structure of the vertebral column and spinal cord. 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. 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 MRI result. 1. L5/S1 and L4/5 postero-central disc protrusion present. Although appears to displace the thecal sac, not causing nerve root compression - When the posterior longitudinal ligament is ruptured or weakened, the disk-shaped cartilage bumps out into the canal where the spinal cord is. This bumping may or may not compress the thecal sac and the nerves at this level. 2. Disc height reduction and desiccation identified L4/5 and L5/S1 levels - the disk-shaped cartilages are somewhat most and elastic. When they degenerate (because of the age, long-term inappropriate ergonomics etc) they loose their moist and become flattened. 3. Minimal facet joint disease in lower lumber region - The vertebral bodies are interconnected with joints that are called facet joints. Disease of facet joints is exactly the same as arthritis of a knee joint or any other joint in the body. This also occurs because of many factors and can cause pain. Please let me know if you have any additional question. Best Regards,