The nerve root had to be sacrificed in 34 cases and resulted in minor sensory deficits in 16 patients (12.5%) and slight motor weakness (MRC Grade 3/5) in 3 (2.3%).

• 34例手术未能保留神经根，导致16位患者（12.；5%25）术后存在轻度感觉缺失，3位患者（2