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Abstract
A new type of block vertebral malformation is described. A 42-year-old woman presented
after an akinetic seizure. Routine cervical spine films, obtained because of a recent
history of abnormal head posture, disclosed a vertebral anomaly. Computed tomography
and conventional polytomography revealed that the lesion was composed of a butterfly
vertebra as the upper portion of a pair of nonsegmented vertebrae. Vertebral fusion
and segmentation anomalies are reviewed and compared with the specific features of
this case.
Keywords
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© 1989 Published by Elsevier Inc.