Os odontoideum with "free-floating" atlantal arch causing C1-2 anterolisthesis and retrolisthesis with cervicomedullary compression.
Behari
Sanjay
S
Department of Neurosurgery, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow - 226 014, India.
Jaiswal
Awadhesh
A
Srivastava
Arun
A
Rajput
Dinesh
D
Jain
Vijendra K
VK