AAO-HNSF	American Academy of Otolaryngology–Head and Neck Surgery
AUC	Area under the curve
CCDS	Color-coded duplex sonography
CEUS	Contrast-enhanced ultrasonography
CI	Confidence interval
CLA	Cervical lymphadenopathy
CLN	Cervical lymph node
CT	Computed tomography
DKG	Deutsche Krebsgesellschaft
DWI	Diffusion-weighted imaging
EFSUMB	European Federation of Societies for Ultrasound in Medicine and Biology
ENT	Ear, nose, and throat
18F-FDG	18F-fluorodeoxyglucose
FNAC	Fine-needle aspiration cytology
HNSCC	Head and neck squamous cell carcinoma
IQR	Interquartile range
LAD	Long-axis diameter
min	Minutes
mpUS	Multiparametric ultrasound
MRI	Magnetic resonance imaging
NHS	National Health Service
NPV	Negative predictive value
PACS	Picture Archiving and Communication System
PET	Positron emission tomography
PET/CT	Positron emission tomography/computed tomography
PET/MRI	Positron emission tomography/magnetic resonance imaging
PPV	Positive predictive value
ROC	Receiver operating characteristic
ROI	Region of interest
S	Seconds
SAD	Short-axis diameter
SD	Standard deviation
SEER	Surveillance, Epidemiology, and End Results
STARD	Standards for Reporting Diagnostic Accuracy Studies
SWE	Shear-wave elastography
T	tesla
US	Ultrasound
USA	United States of America