12 / 2351
9
9
RPS
Mass
Lower RPS: virtual space
Pre-RT
3 months post-RT
Post-RT edema
Retropharyngeal space / Danger space
‘Elevator space’
Tonsillitis + RP nodes
Retropharyngeal space / Danger space
Neck abcess extending into mediastinum
Perivertebral space (PVS)
Contents
PVS: Prevertebral /
Paraspinal portion
Muscles
–
scalene, prevertebral /
paraspinal
Nerves
–
brachial plexus, phrenic
Vertebral artery / vein
Vertebral body
PVS
Mass
prevertebral portion