Obturator nerve impingement caused by an osteophyte in the sacroiliac joint: A case report

Figure 1 Plain magnetic resonance imaging of the lumbar before the operation. A: T1 sagittal image showing intervertebral disc bulging at the L4/5 level, which caused slight compression of the anterior edge of the dural sac but not to the extent that causes neurological symptoms; B: T2 sagittal image of the L4/5 level; C: The horizontal image correlated with the L4/5 intervertebral space, as indicated by the yellow scout line in the panel.