In this prospective observational trial the effect of the Endoscopic discectomy microinvasive therapy should be examined in (approximately 500) adult patients with low back pain.

Inclusion Criteria:

• lumbar disc prolapse with unilateral radiculopathy, on clinical evaluation, positive straight leg raise or femoral stretch test, and identification of a single nerve root lesion on MRI

Exclusion Criteria:

• The exlusion criteria: bilateral root symptoms, double root involvement, cauda equina syndrome and negative MRI Picture for disc herniation, unsigned infomed consent