 Creatinine 2.1, CK 346. EKG normal. The differential diagnosis included Amyotrophy, Polymyositis, Epidural hematoma, Disc Herniation and Guillain-Barre syndrome. An MRI of the lumbar spine was obtained, 12/13/95. This revealed an L3-4 disc herniation extending inferiorly and behind the L4 vertebral body. This disc was located more on the right than on the left 