Emerging aspects of oesophageal and gastro-oesophageal junction cancer histopathology – an update for the surgical oncologist

Table 4 Residual (R) tumour classification system [45]

R Classification	Meaning
R0	Complete resection of microscopic and macroscopic disease
R1	Incomplete resection; residual microscopic disease
R2	Incomplete resection; residual macroscopic disease

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