Impact of homogeneous pathologic response to preoperative chemotherapy in patients with multiple colorectal liver metastases

Table 1 Details of the Rubbia-Brandt and MD Anderson classifications

The Rubbia-Brandt classification	The MD Anderson classification
TRG1: Absence of residual cancer and large amount of fibrosis	Complete response: No residual cancer cells
TRG2: Rare residual cancer cells scattered throughout the fibrosis	Major response: 1%-49% of residual cancer cells
TRG3: More residual tumor cells but fibrosis predominates	Minor response: More than 50% of residual cancer cells
TRG4: Residual cancer cells predominate over fibrosis
TRG5: No signs of regression.

TRG: Tumor regression grade.