Block vertebra C3/4

Case contributed by Dr Sajoscha Sorrentino

Patient Data

Age: 15
Gender: Male

Cervical spine radiograph

Fusion of the anterior and posterior elements of C3/4 vertebrae with loss of intervening disc space. Loss of cervical lordosis. 

Case Discussion

Block vertebra is a congenital failure of segmentation of somites. May be partial or complete involving anterior and/or posterior elements. May demonstrate a decreased anteroposterior vertebral body diameter. Usually asymptomatic. Secondary to the fusion, these vertebrae are not amenable to degenerative changes, however the additional stress is transferred on to the distal joint. They may be accompanied by neural foraminal narrowing or enlargement. 

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Case information

rID: 15995
Published: 4th Dec 2011
Last edited: 13th Aug 2019
Inclusion in quiz mode: Included

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