A 55-year-old man complains of a 4-month history of lower back pain that is worsened by walking and relieved by lying down. He denies back trauma, heavy lifting, or urologic abnormalities. He states, that at times, the pain radiates to the back of his right leg. Examination His blood pressure is 130/84 mm Hg and his pulse rate is 80 beats per minute; he is afebrile. He is slightly overweight. The findings from his heart and lung examinations show no abnormalities.

The back is without scoliosis. Raising either leg reproduces the pain, which radiates to the right leg. The results from the neurologic examination are normal. What is the likely diagnosis? (Answer is posted in the comment section below!) *This case is from the Docplexus editorial team for educative purposes only. Source : Case Files Surgery