Review
Copyright ©The Author(s) 2020.
World J Clin Oncol. Oct 24, 2020; 11(10): 761-808
Published online Oct 24, 2020. doi: 10.5306/wjco.v11.i10.761
Table 1 Assessment of response to chemotherapy in primary colorectal carcinoma using the Tumour Regression Score (AJCC)
EvaluationTumour regression score
No viable cancer cells (complete response)0
Single cells or rare small groups of cancer cells (near-complete response)1
Residual cancer with evident tumour regression, but more than single cells or rare small groups of cancer cells (partial response)2
Extensive residual cancer with no evident tumour regression (poor or no response)3