Tumor Regression Grades: Can They Influence Rectal Cancer Therapy Decision Tree?

Table 1

Mandard TRG system.

TRG1	No viable cancer cells, complete response
TRG2	Single cells or small groups of cancer cells
TRG3	Residual cancer outgrown by fibrosis
TGR4	Significant fibrosis outgrown by cancer
TRG5	No fibrosis with extensive residual cancer