Breast cancer surgery treatment	Level of evidence	Recommendation strength
3.1	Breast surgery
3.1.1	Lumpectomy[18,19]	I	A
3.1.2	Total mastectomy[12]	I	A
3.1.3	Modified radical mastectomy[20]	I	A
3.1.4	Skin-sparing mastectomy[21]	II	A
3.1.5	Nipple-sparing mastectomy[22]	II	A
3.2	Surgical axillary staging
3.2.1	Sentinel lymph node biopsy[23]	I	A
3.2.2	Axillary lymph node dissection[12]	I	A
3.3	Oncoplastic and reconstructive surgery
3.3.1	Oncoplastic techniques for breast conservation[12,17]	II	A
3.3.2	Breast reconstruction following mastectomy
3.3.2.1	Timing of reconstruction
	a. Immediate reconstruction[12,17]	II	A
	b. Delayed reconstruction[12,17]	II	A
	c. Delayed-immediate reconstruction[12,17]	II	A
3.3.2.2	Type of reconstruction
	a. Implant reconstruction[12,17]	II	A
	b. Autologous tissue reconstruction[12,17]	II	A
	c. Autologous tissue combined with implant reconstruction[12,17]	II	A