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Tumor regression grading after preoperative chemoradiotherapy for rectal cancer from the German Rectal Cancer Study Group
Tumor regression grading after preoperative chemoradiotherapy for rectal cancer from the German Rectal Cancer Study Group
Tumor regression grade
Definition
Number of patients*
Five-year disease-free survival (%)
0
No regression
28
78
1
<25% of tumor mass
47
55
2
≥25 to 50% of tumor mass
43
83
3
>50% of tumor mass
186
73
4
Complete regression
40
86
* Not all numbers in the respective variables add up to 344 patients because data with unknown factors were excluded from analysis.
Data from: Rödel C, Martus P, Papadoupolos T, et al. Prognostic significance of tumor regression after preoperative chemoradiotherapy for rectal cancer. J Clin Oncol 2005; 23:8688.
Graphic 95448 Version 3.0
