表 2. The clinical meaning of Miller-Payne (MP) system.

MP分级的临床意义

MP		Morphological characteristics of tumor cells
Low grades	Level 1	No reduction in tumor cell
	Level 2	No more than 30% reduction of tumor cell
	Level 3	30%−90% reduction of tumor cell
High grades	Level 4	More than 90% reduction of tumor cell
	Level 5	No tumor cell or ductal carcinoma in situ