Patterns of Cellular Distribution with the Sentinel Node Positive for Breast Cancer

Table 1

Patient and tumor characteristics.

	Study population
	N: 12 (100%)
Age (years)
Mean	55
Range	44–79
Histologic type
IDC	8 (66.6)
ILC	2 (16.6)
Mixed IDC/ILC	2 (16.6)
Tumor stage
IIA	6 (50)
IIB	1 (8.3)
IIIA	5(41.6)
Tumor grade
I	2 (16.6)
II	8 (66.6)
III	1(8.3)*
LVI
Present	7 (58.3)
Absent	5(41.6)
ER/PR status
ER and/or PR positive	12 (100)
ER/PR negative	0
Her2neu	1 (8.3)
Positive	11 (91.6)**
Negative

*One patient had received neoadjuvant chemotherapy so tumor grade is not available.
**IHC was performed first and if intermediate FISH was done.
IDC: infiltrating ductal carcinoma, ILC: infiltrating lobular carcinoma, LVI: lymphovascular invasion, ER: estrogen receptor, and PR: progesterone receptor.