3D	three-dimensional
BoNT-A	botulinum toxin type A
C1	first cervical vertebra
C2	second cervical vertebra
CCSVI	chronic cerebrospinal venous insufficiency
CN	cranial nerve
CT	computed tomography
CTA	computed tomography angiography
CTV	computed tomography venography
ECA	external carotid artery
ESP	elongated styloid process
HBV	hepatitis B virus
ICA	internal carotid artery
IJV	internal jugular vein
J3	third (jugular foramen) segment of the internal jugular vein
MRA	magnetic resonance angiography
NSAID	non-steroidal anti-inflammatory drug
OPG	orthopantomogram
SCM	sternocleidomastoid
SHC	stylohyoid complex
SHL	stylohyoid ligament
SJVCS	styloidogenic jugular venous compression syndrome
SP	styloid process
TIA	transient ischaemic attack