Sentinel Lymph Node Biopsy After Neoadjuvant Chemotherapy For Locally Advanced Breast Cancer

Inclusion Criteria: * Female patients over 18 years of age with biopsy-proven breast cancer * Patients presenting with locally advanced disease in the breast (cT4) and/or in the nodes (cN2/N3) as assessed by clinical exam and imaging * Patients presenting to surgery clinic after receipt of NAC at outside hospital with documentation of cT4 or cN2/3 disease on initial outside physical exam and imaging studies * Patients receiving NAC and having a nodal complete clinical response as assessed by physical exam Exclusion Criteria: * Patients with a prior history of ipsilateral breast cancer * Pregnant patients * Patients with persistent palpable axillary nodes after NAC, as assessed by physical exam * Patients not consenting to ALND