Tissue Response Score Score Score Score Score
0 = Absent 1 = Minimal 2 = Mild 3 = Moderate 4 = Marked
Neovascularization
Absent
Minimal capillary proliferation (1-3 capillary buds, small blood vessels, venules, and / or arterioles)
Groups of 4-7 capillaries
Broad band of capillaries with supporting structures
Extensive band of capillaries with supporting fibroblastic structures