Feasibility of sentinel lymph node biopsy in breast cancer patients clinically suspected of axillary lymph node metastasis on preoperative imaging

Table 2 Clinical and pathologic characteristics of SLNB for subgroups based on clinical suspicion of lymph node metastasis

Characteristics	NSI^* (n=147)	SI^* (n= 176)	P(Chi-square test)
Mean age ± SD	51.90 ± 9.99	50.35 ± 9.60	0.790
Axillary recurrence			0.152
No	146	171
Yes	1	5
Recurrence			0.017
No	143	159
Yes	4	16
T stage			0.022
pT1	112	120
pT2	34	45
pT3	1	11
N stage			0.002
pN0	129	127
pN1	17	35
pN2	1	7
pN3	0	7
Stage			0.002
Stage I	101	98
Stage IIA	37	41
Stage IIB	8	21
Stage IIIA	1	9
Stage IIIC	0	7
Size of tumor, cm, mean ± SD	1.58 ± 0.89	2.06 ± 1.91	0.463
Histology			0.013
G1	53	47
G2	74	73
G3	19	43
Nuclear			0.005
G1	28	22
G2	100	103
G3	18	45
ER			0.009
Negative	33	63
Positive	114	113
PR			0.167
Negative	48	71
Positive	98	105
IHC			0.086
Negative/1+	81	92
2+	40	38
3+	23	45
Lymphovascular invasion			0.013
No	113	113
Yes	34	63

^*Clinically suspicious for axillary LN metastasis on preoperative imaging techniques (SI) patients are those with any of preoperative imaging techniques, including US, MRI, and PET scan, who were suspected of axillary LN metastasis, and NSI are those not suspected of LN metastasis.ER,estrogen receptor; PR,progesterone receptor; IHC,immunohistochemistry.

ISSN: 1477-7819