CIN	Chromosomal instability
CNV	Copy number variation
cfDNA	Cell-free DNA
ddPCR	Droplet digital PCR
EADC	Esophageal adenocarcinoma
EBV	Epstein–Barr virus
FFPE	Formalin fixed paraffin embedded
GAC	Gastric adenocarcinoma
GEA	Gastroesophageal adenocarcinoma
GS	Genomic stable
HER2	Human epidermal growth factor receptor-2
IHC	Immunohistochemistry
MMR	Mismatch Repair
MSI	Microsatellite instability
MSI-H	Microsatellite instability high
MSI-L	Microsatellite instability low
MSS	Microsatellite stable
OS	Overall survival
PD-1	Programmed cell death protein 1
PD-L1	Programmed death-ligand 1
SNV	Single nucleotide variation