1. Congenital absence of pedicle from the cervical vertebrae;Hadley;AJR,1946
2. Congenital absence of a pedicle in a cervical vertebra;Chapman,1976
3. Absent cervical pedicle;Liliequist;Acta Neurochir (Wien),1977
4. Congenital absence of a pedicle in the cervical spine: a new approach with CT scan;Brugman;Neuroradiology,1979
5. Computed tomography in absent cervical pedicle;Lauten;AJNR,1980