Table 2. Histological features of phyllodes tumor.

HPF: High power fields; NA: Not available.

Case no.	Mitoses per 10 HPF	Cellular atypia	Stromal overgrowth	Necrosis	Stromal hypercellularity	Type of tumor borders
1	5-9	Yes	NA	No	NA	Intermediate
2	0-4	Yes	NA	No	Modest/moderate	Intermediate
3	≥10	Yes	Yes	No	Marked	Invasive
4	0-4	Yes	No	No	Modest/moderate	Pushing/circumscribed
5	≥10	Yes	Yes	No	Modest/moderate	Invasive
6	≥10	Yes	No	No	Modest/moderate	Intermediate
7	0-4	Yes	No	No	Modest/moderate	NA
8	0-4	Yes	NA	No	Modest/moderate	Pushing/circumscribed
9	0-4	Yes	NA	No	Modest/moderate	Intermediate
10	5-9	Yes	Yes	Yes	Marked	Pushing/circumscribed
11	5-9	Yes	Yes	No	Marked	Intermediate