Intraoperative Injection of Technetium-99m Sulfur Colloid for Sentinel Lymph Node Biopsy in Breast Cancer Patients: A Single Institution Experience

Table 1

Demographic data.

	Frequency	Percent
Ethnicity
Caucasian	1,874	80.3
Black	222	9.5
Hispanic	113	4.8
Asian	66	2.8
Other	58	2.5
Age (years)
<30	22	0.9
31–40	164	7
41–50	608	26.1
51–60	649	27.8
61–70	553	23.7
>71	337	14.4
Tumor Histology
Infiltrating ductal	1,573	67.4
Infiltrating lobular	242	10.4
Mixed ductal and lobular	137	5.9
Ductal carcinoma in situ	253	10.8
Other	128	5.5
Molecular subtype
ER/PR positive, Her-2 negative	1,494	64
ER/PR positive, Her-2 positive	160	6.9
ER/PR negative, Her-2 positive	102	4.4
ER/PR negative, Her-2 negative	243	10.4
T stage
0	253	10.8
1	1,366	58.6
2	592	25.4
3	111	4.8
4	11	0.5
Tumor grade
Well differentiated	499	21.4
Moderately differentiated	1,110	47.6
Poorly differentiated	557	23.9
Surgery
Partial mastectomy	1,277	54.7
Mastectomy (including bilateral, simple, and modified radical)	1,056	45.3