Spinal Stenosis and Spondylolisthesis:
Spinal canal stenosis refers to a narrowing (stenosis) of the spinal canal.
Spinal canal and nerve root canal stenoses (foraminal stenosis) can develop as a result of: (a) hypertrophic degeneration of bony elements, facet joints, and ligamentous structures (such as ligamentum flavum hypertrophy) associated with aging, and (b) vertebral slippage (spondylolisthesis — resulting in secondary spinal canal stenosis).
Due to progressive compression of the neural structures, patients experience pain, numbness, paresthesias, and muscular weakness in the legs after walking a certain distance (in severe cases, even after as little as 10 meters). This classic symptom complex is known as neurogenic claudication (claudicatio spinalis), which is distinguished clinically from vascular claudication (claudicatio vera — caused by peripheral arterial occlusive disease). The decision to proceed with surgical therapy depends on the patient's individual symptom burden and functional limitation. The surgery consists of microscopic or endoscopic decompression of the spinal canal to liberate the compressed spinal cord and nerve roots. As with disc herniations, minimally invasive keyhole procedures are feasible and indicated for the vast majority of patients. However, secondary spinal canal stenosis caused by spondylolisthesis (frequently associated with segmental instability) should not only be decompressed, but also anatomically reduced and instrumented/stabilized.
Example 6: A 77-year-old retired woman in good general health and slightly overweight noticed that over the past six to nine months she had developed significant back and leg discomfort, particularly noticeable during her weekly grocery shopping. After walking about 100 meters, she had to stop and sit down for the discomfort to settle. Her son acquired a wheeled walker (rollator) for her, which provided temporary coping. Over the past month, however, she could barely walk 10 meters despite all assistance. An MRI of the lumbar spine revealed absolute spinal canal stenosis at L3/L4 and L4/L5. In view of the severity of her symptoms, we recommended surgical decompression of the affected levels. The surgery was carried out utilizing an endoscopic keyhole technique. The very next day, the patient experienced marked improvement in sensation in her legs, and the pain had substantially diminished. She is now able to actively participate in a weight reduction program recommended by her family physician. Nota bene: The course of disease in your specific case may differ from the clinical example described here.
Example 7: A 60-year-old significantly overweight female patient reported requiring assistance from others to stand up after prolonged sitting for several months. She experienced substantial pain primarily in her lower back, accompanied by nocturnal tingling in both legs. The discomfort would temporarily ease after walking approximately 100 meters. Conservative modalities such as physical therapy, massage, pain medications, and acupuncture offered only minimal, short-lived relief. During the previous week, after a 50 km drive, she was completely unable to get out of the car. Diagnostic workup revealed spondylolisthesis (vertebral slipping) of L4/L5 with secondary spinal canal stenosis. Dynamic flexion-extension X-rays of the lumbar spine demonstrated clear segmental instability at L4/L5, explaining her debilitating pain. Surgical treatment consisted of dorsal stabilization of L4/L5 using a pedicle screw-rod system combined with microdecompression of the spinal canal and intervertebral body fusion using cages. Following the intervention, the patient was mobilized immediately. Incisional wound pain was present but incomparable to her previous chronic pain. Her mobility was markedly superior. Postoperative X-ray control confirmed anatomically correct placement of all implants. Nota bene: The course of disease in your specific case may differ from the clinical example described here.