Measurement of Extracapsular Extension in Sentinel Lymph Node As a Possible Predictor of Residual Axillary Disease in Breast Cancer

•This study aimed to find the clinical significance of the extracapsular extension in sentinel lymph nodes on the number of additional involved axillary lymph nodes, overall survival, and disease-free survival.•One hundred twenty-eight patients with positive sentinel lymph nodes were separated into two groups according to the presence or absence of ECE and following during 10 years.•There was found a positive correlation between the presence of ECE and the number of additional positive lymph nodes. Therefore, this does not impact overall survival, and disease-free survival in a follow-up of 10 years.