Table 1 Characteristics of patients on whom SLN scintigraphy procedures were performed

Number of patients

330

Age of initial cancer diagnosis (years)

47.88

Median age (range)

48

Tumor size (mean size range) (mm)

18

Histology

 Invasive ductal cancer

250

75.7

 Invasive lobular cancer

56

16.9

 Others

24

7.2

Stage

 Stage I

145

43.9

 Stage II

148

44.8

 Stage III

37

11.2

Hormone status of tumor

 Hormone receptor positive

 ER+

244

74

 PR+

211

64

 Hormone receptor negative (ER-, PR-)

79

24.80

 Triple negative (ER-, PR-, HER2-)

53

16