Lippincott Williams & Wilkins

Vacuum phenomenon. Usually only seen on extension films along the anterior surface of the spine in the disc spaces. Looks like a thin lucent line…caused by a tear in the disc and release of air. Miscellaneous: m/c congenital spinal anomaly is C2/C3 fusion. Adult ADI = 1-3mm…Child ADI = 3-5mm ................
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