Use of reoperative sentinel lymph node biopsy in breast cancer patients.

Background: Ipsilateral breast recurrence or second primary breast cancer can develop in patients who have undergone breast conservation and sentinel lymph node biopsy (SLNB). This brings into question the necessity of complete axillary lymph node dissection (CALND) versus a second SLNB (remapping). Our objective is to determine the feasibility of a reoperative SLNB.