Category Medical Specialty
winking owl sign 680

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'.

Louis Henri Vaquez (1860-1936) 680

Louis Vaquez

Louis Henri Vaquez (1860-1936) was a French physician and cardiologist. Described polycythaemia vera (Vaquez-Osler disease) in 1892