Bull Nixon syndrome
A congenital bone abnormality where the skull and vertebrae meet which can compress some of the brain structures and result in neurological abnormalities. The defect is often associated with other vertebral abnormalities. In severe cases, the cerebrospinal fluid flow may be obstructed which can cause fluid to build up inside the skull (hydrocephalus).
Some of the symptoms of Bull-Nixon syndrome incude: * Short neck * Asymmetrical skull * Asymmetrical face * Pain on moving neck * Torticollis