Consequences of Axillary Ultrasound in Patients with T2 or Greater Invasive Breast Cancers

Background Axillary ultrasound (AUS) with needle biopsy is used to detect metastasis in patients with invasive breast cancers. Our hypothesis is that preoperative AUS significantly reduces sentinel node biopsy (SLNB) use in patients with invasive breast tumors >2 cm upon clinical examination.