<prompt> Sentinel lymph node biopsy in carcinoma breast is done ifLN palpableBreast mass but no lymph node palpableBreast lump with palpable axillary nodeMetastic CA breast  <response>: Sentinel lymph node is the first axillary lymph node draining the breast. SLNB is done in all cases of early breast cancers ,T1 and T2 without clinically palpable nodes. It is not done in clinically palpable axillary nodes as tgere is already distoion of lymphatic flow due to tumour. SRBs Manual of Surgery.Edition -5. Pg no:543 