Factors Use of SLNB (+) (%) (
𝑛
=
4
0
)
𝑃
valueAge: 0.611 <50 (
𝑛
=
3
0
) versus ≥50 (
𝑛
=
3
3
) 18 (60%) versus 22 (66.7%) Palpable mass*: 0.017 (−) versus (+) 23 (44.2%) versus 16 (88.9%) Tumor size: 0.006 ≤30 mm (
𝑛
=
4
0
) versus >30 mm
𝑛
=
2
3
) 20 (50%) versus 20 (87%) Comedo necrosis*: 0.026 present (
𝑛
=
3
1
) versus absent
𝑛
=
2
6
) 24 (77.4%) versus 12 (46%) Nuclear grade*: 0.012 low (
𝑛
=
1
5
) versus intermediate and
𝑛
=
3
4
) 5 (33.3%) versus 25 (73.5%) Type of surgery: 0.001 breast conservation (
𝑛
=
3
1
) versus
𝑛
=
3
2
) 13 (41.9%) versus 27 (84.4%) Multifocality/multicentricity: 0.182 (−) (
𝑛
=
2
8
) versus (+) (
𝑛
=
3
4
) 21 (75%) versus 19 (55.9%) Estrogen receptor status*: 0.622 (+) (
𝑛
=
2
1
) versus (−) (
𝑛
=
7
) 17 (81%) versus 5 (71.4%) Progesteron receptor status*: 0.634 (+) (
𝑛
=
1
8
) versus (−) (
𝑛
=
1
0
) 15 (83.3%) versus 7 (70%) HER2/neu*: 0.364 (IHC 3+) or FISH (+) (
𝑛
=
1
6
) versus
𝑛
=
9
) 11 (68.8%) versus 8 (88.9%)