1999 年 48 巻 3 号 p. 730-732
We performed 425 lumber disk herniations surgeries between April 1993 and March 1998. Twenty-three were of the upper lumber disk herniations (L1-2, L2-3, L3-4). We analyzed these patients according to their clinical symptoms, radiological findings and surgical results. Preoperative signs and symptoms were highly variable, and the incidence of cauda equina syndrome was relatively high in our series (57%). We believe these symptoms to have close relations with the charactaristics of the posterior longitudinal ligament and type of herniated nucleus polposus in the upper lumbar spine.