Congenital absence of a pedicle in a cervical vertebra.
The importance of agenesis of a pedicle lies in its resemblance to a destructive lesion of the pedicle or to an expanding lesion in an intervertebral foramen. The correct diagnosis can be made roentgenologically by demonstrating a widened intervertebral foramen at the level of an absent pedicle with posterior displacement of the maldeveloped lateral mass. Two cases of agenesis of a pedicle in a cervical vertebra are presented.
D002574:Cervical Vertebrae / Q000002:abnormalities* / Q000000981:diagnostic imaging; D000013:Congenital Abnormalities / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography; D013115:Spinal Canal / Q000002:abnormalities / Q000000981:diagnostic imaging; D013122:Spinal Diseases / Q000000981:diagnostic imaging / Q000503:physiopathology