Category Orthopaedics
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Baastrup disease

Baastrup sign (kissing spines) refers to an orthopaedic condition / radiological sign with enlargement and approximation of adjacent spinous processes with normal intervertebral disc height and neuroforamina
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Winking owl sign

One of the first signs of vertebral metastases is disappearance of the pedicle on the AP X-ray. This is known as the 'absent pedicle' or 'winking owl sign'.