All 17 patients complained of low back pain, and 5 had intermittent claudication, 9 had leg radicular pain, 7 had leg numbness and 11 had leg weakness.

• 17例均有持续或间歇性腰背痛，间歇性跛行5例、下肢反射痛9例、下肢麻木7例、下肢肌力减弱11例。