5-FU	5-fluorouracil
CI	confidence interval
CPS	combined positive score
CT	computed tomography
CTCAE	Common Terminology Criteria for Adverse Events
CTV	clinical target volume
GTV	gross tumor volume
HR	hazard ratio
IMRT	intensity-modulated radiation therapy
IQR	interquartile range
nCRT	neoadjuvant chemoradiotherapy
OAR	organs at risk
OS	overall survival
pCR	pathological complete response
PET/CT	positron emission tomography with 2-deoxy-2-[fluorine-18]fluoro-D-glucose integrated with computed tomography
pN+	pathological residual node disease
pT+	pathological residual primary disease
PTV	planning target volume
SAD	source–axis distance
SCC	squamous cell carcinoma
SOC	standard of care
SUVmax	maximum standardized uptake value
TNM	Tumor-node-metastasis
TRG	tumor regression grade