<prompt> Breast cancer is conservatively treated by following methodsIt is based on relative size of breast tumorRadiotherapy is givenChemotherapy is givenSurgery is best modality of treatment  <response>: Breast conservation surgery The amount of breast tissue excised with the lesion may vary with the clinical situation, but is typically 5mm to 10mm in all directions BCS may consist of removal of tumor with 1 cm margin of normal tissue wide local excision or a more extensive excision of a whole quadrant of breast Quandrantectomy Ref: Mastery of Surgery 5th edition Pgno : 525 