Table 14. Recommendations of adjuvant radiotherapy for patients after breast-conserving surgery.

Stratification	Level I recommendations	Level II recommendations
DCIS	WBI ± tumor bed boost (2B)	APBI (2A)
Invasive carcinoma (negative axillary lymph nodes)	WBI (1A) ± tumor bed boost (1B)	(I) APBI (2A)
		(II) Whole-breast one-week hyperfractionated schedule (2A)
		(III) WBI ± tumor bed boost + regional lymph node radiotherapy (2B)
Positive axillary lymph nodes, with axillary lymph node dissection	WBI ± tumor bed boost + regional lymph node radiotherapy (1B)	WBI ± tumor bed boost (2B)
1–2 positive sentinel lymph nodes, without axillary lymph node dissection	WBI + tumor bed boost (1A)	WBI + tumor bed boost + regional lymph node radiotherapy (including axilla) (2B)
≥3 positive sentinel lymph nodes, without axillary lymph node dissection	−	WBI + tumor bed boost + regional lymph node radiotherapy (including axilla) (2B)

DCIS, ductal carcinoma in situ; WBI, whole breast irradiation; APBI, accelerated partial breast irradiation.