Fig. 1

Pathologic response according to the tumor regression grade (TRG) scoring standard. A TRG1, absence of residual cancer cells and an abundance of fibrosis. B TRG2, a large amount of fibrosis and scattered rare residual cancer cells. C TRG3, more residual cancer cells, but fibrosis predominates. D TRG4, presence of abundant residual cancer cells that predominate over fibrosis; and E TRG5, almost completely cancer cells with an absence of fibrosis