We experienced a 70-year-old male case suffering L3 and L4 roots impairment due to L2/3 disc hernia, and L4 root impairment due to dumbbell tumor. He complained of severe low back pain, right femoral neuralgia, weakness, and urinary infection. MRI revealed two lesions; one was a tumor in the psoas muscle at the L3-L5 level originating from the L4 root ans the other was a downward sequestrated mass from the L3/4 disc. We operated two-stages from the anterior to posterior. The anterior tumor was histologically neurinoma and the sequestarted hernia mass impinged both the L3 and L4 roots.