The Oncologic Safety of Sentinel Lymph Node Biopsy in Patients with Node-Positive Breast Cancer with Complete Response to Neoadjuvant Chemotherapy: A Single-Center Experience

Table 1

Clinical staging before and after neoadjuvant chemotherapy (NAC).

Clinical staging	Before NAC n (%)	After NAC n (%)
cT
0	0 (0.0)	22 (23.9)
1	14 (15.2)	60 (65.2)
2	72 (78.3)	7 (7.6)
3	5 (5.4)	1 (1.1)
4b	1 (1.1)	0 (0.0)
cN
0	0 (0.0)	90 (97.8)
1	82 (89.1)	2 (2.2)
2	10 (10.9)	0 (0.0)
cM
0	92 (100.0)	92 (100.0)
C stage
0	0 (0.0)	22 (23.9)
1A	1 (1.1)	60 (65.2)
2A	15 (16.3)	9 (9.8)
2B	62 (67.4)	1 (1.1)
3A	13 (14.1)	0 (0.0)
3B	1 (1.1)	0 (0.0)