Vertebral fusion
More common causes
Rheumatoid arthritis
Spinal fusion surgery
Less common causes
Juvenile idiopathic arthritis
Vertebral osteomyelitis
Axial spondyloarthritis
Diffuse idiopathic skeletal hyperostosis
Spondylodiscitis
Klippel-Feil syndrome
Morquio syndrome
Uncommon causes
Fibrodysplasia ossificans progressiva
Spondylocarpotarsal synostosis syndrome
Lateral meningocele syndrome
Congenital scoliosis