What are histoprognostic groups/grade groups?

• Group 1 (G 3+3 or under) • Group 2 (G 3+4) • Group 3 (G 4+3) One should indicate % of grade 4 in group 2 and 3 • Group 4 (G 4+4, 3+5, 5+3) • Group 5 (G 4+5, 5+4, 5+5)