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The efficacy of axillary lymph node dissection (ALND) following sentinel lymph node biopsy (SLNB) has been questioned. The present study was performed to determine the sensitivity, specificity and accuracy of axillary ultrasound (US) and fine needle aspiration biopsy (FNAB) in the diagnosis of axillary metastases in patients with early breast cancer. A total of 214 patients with stage I and II breast cancer between June 2015 and January 2017 were included. All of the patients received axillary US as a primary investigation for lymph node status. US-guided FNAB was performed on suspicious lymph nodes. Those with non-suspicious and FNAB-negative axillary nodes proceeded to SLNB at the time of primary breast surgery. ALND was performed when the result of the US-guided FNAB was positive. The results of US and cytology were compared to histopathological results to determine their sensitivity, specificity, positive and negative predictive value and accuracy. A total of 76 out of 214 patients (35.5%) had axillary lymph node metastases at final histology. The sensitivity and specificity of axillary US alone were 59.2% (45/76) and 78.3% (108/138), respectively. Axillary US with FNAB identified 32 patients with positive lymph node metastases, and increased the sensitivity and specificity to 71.1% (32/45) and 100.0% (30/30). Combined with FNAB, the positive and negative predictive values were 100.0% (32/32) and 69.8% (30/43), respectively. Axillary US-alone or combined US/FNAB had a high accuracy rate and a satisfactory result as they cost less and it is easy to assess the status of axillary lymph nodes. Thus, axillary US with FNAB may avoid unnecessary SLNB in a significant number of patients.

Axillary ultrasound and fine needle aspiration biopsy in the preoperative diagnosis of axillary metastases in early‑stage breast cancer