[Lumbar spinal stenosis : From the diagnosis to the correct treatment].

The number of patients with the diagnosis of lumbar spinal stenosis (LSS) is steadily increasing and simultaneously, the patients' expectations are also increasing. Nevertheless, evidence from studies for the appropriate treatment is still lacking. Treatment options mainly result from the practitioner 's experience and the clinical focus. The findings described in magnetic resonance imaging (MRI) often do not correlate with the patient's symptoms. Basically, the treatment should be started with a conservative treatment and preferably with a multimodal approach. Severe pain with extensive neurogenic claudication symptoms and unsuccessful conservative treatment should be treated surgically. Absolute indications for surgery, such as a conus-cauda syndrome are rare. The goal of all surgical procedures is to decompress the spinal canal without compromising the stability of the motion segment. Instability can also make an additional fusion necessary.