This is basically another term for spondylolisthesis. Anterolisthesis is a spine condition in which the upper vertebral body, the drum-shaped area in front of each vertebrae, slips forward onto the vertebra below. The amount of slippage is graded on a scale from 1 to 4. Grade 1 is mild (less than 25% slippage), while grade 4 is severe (greater than 75% slippage).The symptoms of anterolisthesis can vary greatly depending if and how much the slippage pinches the nerve roots and what area is affected.
