from a randomised series of 500 adult patients , average measurements of the normal adult odontoid peg in the vertical and sagittal planes as seen on a standard lateral film of the cervical spine are given , and it is suggested that measurements which fall below this range should be interpreted as indicating `` '' odontoid hypoplasia '' '' irrespective of the cause of the abnormality .
C0028881
odontoid peg
C0728985
cervical spine