[Double traumatic cervical spine lesion (odontoid fracture and spinal cord injury) and Klippel-Feil syndrome].

Klippel-Feil syndrome (KFS) is defined as a congenital fusion of at least two cervical vertebrae. Patients with KFS are known to be at high risk for spinal cord injury in case of cervical trauma even with weak kinetic. We report the case of a patient with C4-C5 and C6-C7 congenital fusion, harbouring C5-C6 post-traumatic spinal cord injury, associated with an odontoid fracture type 2 of Anderson and D'Alonzo classification following a motorbike accident.