Percutaneous endoscopic lumbar discectomy combined with platelet rich plasma injection for lumbar disc herniation: analysis of clinical and imaging outcomes BMC Musculoskeletal Disorders Springer Nature Link The paravertebral lymphatic system is involved in the resorption of the herniated nucleus pulposus and the regression of inflammation associated with disc herniation Osteoarthritis and Cartilage The intradiscal pressure of the lumbar spine is affected by intervertebral disc degeneration, age, level, and motion direction: evaluation of an in vitro database comprising 107 specimens ScienceDirect Intervertebral disc herniation Orthopedist traumatologist