Table 1.

Grading schemes for tumor histology sections

	Grade 0	Grade 1	Grade 2	Grade 3	Grade 4
Percent of necrosis per section	0	1–15	16–49	50–74	75–100
Neutrophils per 400× field†	0–10	11–25	26–49	>50	>150
Lymphocytes per 400× field‡	0–5	6–15	16–30	>30	>150

Notes:

^†The microscopic field with the most severe neutrophilic infiltrate was utilized;

^‡the microscopic field with the most severe lymphocytic infiltrate was utilized.