In simple terms,<unk>  describes the displacement of a vertebrae or the vertebral column in relation to the vertebrae below. It was first described in 1782 by a Belgian obstetrician, Dr. Herbinaux. He reported a bony prominence anterior to the sacrum that obstructed the vagina of a small number of patients. The term<unk> ” was coined in 1854, from the Greek “spondylo” for vertebrae and “olisthesis” for slip. These "slips" occur most commonly in the lumbar spine.
A hangman's fracture is a specific type of<unk>  where the C1 vertebra is displaced anteriorly relative to the C2 vertebra due to fractures of the C2 vertebra's pedicles.
Spondylolisthesis
Disc slip
Vertebral osteomyelitis
Lipohemarthosis
Spinal stenosis
Spondylolysis
Spinal disc herniation
Synarthrosis