Radiculopathy in spondylosis/spondylolisthesis. The laminar/ligamentum flavum process.

Based upon an anthropologic and clinical material a specific bone formation, the ligamentum flavum process (LLFP), is described. The process is present in up to 87 per cent at a lytic site and appears to be the cause of root compression in 68 per cent of the patients with such a skeletal abnormality. LLFP is appreciated in axial CT and should be considered in planning possible surgical intervention.