Posterior vertebral fusion anomalies

Last revised by Dr Daniel J Bell on 16 Nov 2020

Posterior vertebral fusion anomalies are relatively common and should not be mistaken for fractures. They are thought to be both developmental and pathological (e.g. spondylolysis) but are typically asymptomatic and incidental, and considered as anatomical variants. There are six types of posterior vertebral fusion anomalies:

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Cases and figures

  • Figure 1: annotated CT
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  • Case 1: neurocentral synchondrosis
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  • Intrathecal contrast
    Case 2: retrosomatic cleft
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  • Case 3: spondylosis
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  • Case 4: retroisthmic cleft
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  • Case 5: spinous cleft
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