CONGENITAL ABSENCE OF A PEDICLE IN THE CERVICAL SPINE

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Abstract
Congenital absence of a pedicle in the cervical spine results in a large intervertebral foramen which may be confused with 2 acquired conditions: a dumbbell spinal tumor and vertebral erosion produced by a tortuous vertebral artery. Two cases with this developmental defect are added to the 6 reported previously. The roentgenographic features of this congenital disorder and its differentiation from the two acquired conditions are discussed.