Traumatic pneumomyelogram is very rare in literature and there has been no report of paraplegia associated with pneumomyelogram, occurring after removal of an incorrectly seated pedicle screw. We are presenting a rare case of transient monoplegia associated with pneumomyelogram, developed after removal of a mis-inserted pedicle screw into Ll veretebral canal in a 37-year-old male who had been treated with CD spinal instrumentation for two seperated level-lumbar fractures without neurologic deficit.