Table 2.

Distribution of frequency of CD34+ and VEGFR2+ vessels in human breast cancer stroma (all histologic subtypes)

No. of marker+ tumor stromal vessels/TMA core	0	1–5	6–10	>10	Mean # vessels/TMA core (range)	Total number of evaluable cores
CD34+ tumor vessels	9	36	52	89	11 (0–45)	186
VEGFR2+ tumor vessels	42	90	29	8	3.4 (0–20)	169

About half of the evaluable TMA cores exhibited more than 10 CD34+ vessels in the tumor stroma. About half the evaluable TMA cores had lower number (1–5) of VEGFR2+ vessels/TMA core, while about a quarter of cases had no VEGFR2 expressing vessels in the tumor stroma