Predictors of Nonsentinel Nodal Involvement to Aid Intraoperative Decision Making in Breast Cancer Patients with Positive Sentinel Lymph Nodes

Table 1

Correlation analyses of SLN involvement and clinicopathological parameters (𝑛=110).

	Patients with SLN positive only; (𝑛=60)	Patients with non-SLN involvement (𝑛=50)	𝑃 value
Median age (years)	54.0 (37.0 to 80.0)	51.5 (30.0 to 77.0)	0.42
Ethnicity			0.70
Chinese	47	36
Malay	8	8
Indian	2	4
Others	3	2
Family history of breast cancer			0.53
Yes	7	8
No	52	42
Tumour histology			0.20
IDC	56	42
ILC	4	7
Median tumour size (mm)	20.0 (4.0 to 80.0)	24.5 (1.0 t o 55.0)	0.03
Tumour grade			0.99
1	5	6
2	28	19
3	26	23
Lymphovascular invasion			0.81
Present	26	22
Absent	29	27
Associated DCIS			0.97
EIC	10	8
DCIS	25	19
None	22	17
Oestrogen receptor status			0.84
Positive	42	35
Negative	17	13
Progesterone receptor status			0.42
Positive	31	21
Negative	28	26
HER2 status			0.16
Positive	16	10
Negative	27	33
Size of nodal disease			0.01
Macrometastases	46	49
Micrometastases	14	1
Ratio of positive SLN to total SLN harvested			0.01
<0.5	20	8
0.5 to 1	14	8
1	26	34
Number of axillary nodes			0.03
<10	11	3
10 to 20	25	16
20 to 30	17	24
>30	7	7
Distant recurrence			0.34
Yes	5	7
No	55	43
Median Tenon score	5.0 (1.5 to 7.0)	5.75 (2 to 7)	<0.001
Median MSKCC probability	19.5 (3.0 to 74.0)	41.0 (6.0 to 89.0)	<0.001