Spinal stenosis is a rare condition characterized by abnormal narrowing (stenosis) of the spaces within the spinal canal, spinal nerve root canals, or bones of the spinal column (vertebrae). Affected individuals may experience pain in the lower back and/or the legs. In some cases, affected individuals may have difficulty walking. Spinal stenosis may occur as a result of spinal injury, surgery, abnormal bone growth, or deterioration. In some cases, spinal stenosis may be inherited as an autosomal dominant genetic trait.