Fig. 2

Axillary lymph node ultrasound images. Non-suspicious lymph node in clinically node negative cN0 patient and non-metastatic nodes confirmed after ALND (A). Axillary lymph node with eccentric thickening of the cortex in the US, positive FNAC, and one metastatic lymph node in the ALND (B). Atypical lymph node in the US in a clinically N1 patient, with positive FNAC and one metastatic node in the ALND (C). Atypical lymph node with uniform cortical thickening (> 3mm) in a cN0 patient with positive FNAC and more than three metastatic nodes in the ALND (D). Atypical lymph node with compressed fatty hilum and cortical thickening in a cN0 patient with positive FNAC and > 3 metastatic nodes in the ALND (E). Irregular node with a mass-like appearance in a cN0 patient, positive FNAC and > 3 metastatic nodes in the ALND (F)