Fusion of adjacent vertebral segments is not an unusual isolated abnormality and should not be confused with the far less common Klippel Feil syndrome.
Klippel Feil Syndrome
Cranio-cervical decompression associated with non-instrumented occipito-C2 fusion in children with mucopolysaccharidoses: Report of twenty-one cases - North American Spine Society Journal (NASSJ)
Cervical Klippel-Feil syndrome progressing to myelopathy following minor trauma - ScienceDirect
Part 9: Spine Radiology Key
Vertebral anomalies, Radiology Reference Article
A) Plain x-ray taken 1 month prior to surgery showing fusion of
Congenital fusion of C2 - C3, Radiology Case
Anomalous vertebral arteries in Klippel-Feil syndrome with occipitalized atlas: CT angiography - ScienceDirect
Posterior Cervical Fusion Excluding the Occiput
Frontiers Prevalence and Risk Factors of Surgical Treatment for Klippel–Feil Syndrome
