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Related Experiment Videos

The annulus vacuum sign.

S P Bohrer

    Skeletal Radiology
    |January 1, 1986
    PubMed
    Summary
    This summary is machine-generated.

    The annulus vacuum sign in cervical spine extension can indicate acute hyperextension injury but is not exclusive to it. This sign may also appear in old injuries or degenerative conditions, and can be confused with pseudovacuum signs.

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    Area of Science:

    • Radiology
    • Orthopedics
    • Spinal Imaging

    Background:

    • The annulus vacuum sign is an imaging finding observed in the cervical spine.
    • Its association with acute hyperextension injury has been suggested in medical literature.

    Purpose of the Study:

    • To clarify the diagnostic significance of the annulus vacuum sign.
    • To differentiate between acute injury and other causes of the sign.

    Main Methods:

    • Review of imaging findings in cervical spine extension.
    • Analysis of cases with annulus vacuum signs.

    Main Results:

    • The annulus vacuum sign can result from acute hyperextension injury due to Sharpey fiber tearing.
    • The sign is not pathognomonic and can be present in old hyperextension injuries.

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  • Degenerative annular disease without acute trauma can also cause this sign.
  • Distinguishing true vacuum signs from pseudovacuum signs can be challenging.

    • Conclusions:

    • The annulus vacuum sign has multiple potential causes beyond acute hyperextension injury.
    • Radiologists and clinicians should consider differential diagnoses when interpreting this sign.