Table 3

- Features of regional nodal irradiation (RNI).

Survey questions and response(s)n (%)
The following is an indication for RNI after BCS and ALND*
Any N115 (62.5)
Macrometastatic N114(58.3)
N1 with high-risk features16 (66.7)
N1 with inadequate axillary dissection19 (79.2)
N1 with extracapsular extension18 (75)
N221 (87.5)
Any T3N03 (12.5)
T3N0 with high-risk features11 (45.8)
T2N0 with high-risk features4 (16.7)
Nx10 (41.7)
The following is an indication for RNI after MRM*
Any N113 (54.2)
Macrometastatic N113 (54.2)
N1 with high-risk features14 (58.3)
N1 with inadequate axillary dissection18 (75)
N1 with extracapsular extension17 (70.8)
N221 (87.5)
Any T3N05 (20.8)
T3N0 with high-risk features15 (62.5)
T2N0 with high-risk features2 (8.3)
Nx8 (33.3)
The following is an indication for InM LN radiation*
Radiologically positive InM node23 (95.8)
N1 and medially located tumor14 (58.3)
N0 and medially located tumor with certain high-risk features3 (12.5)
When 50% or more of the axilla is positive14 (58.3)
Whenever RNI is indicated for right-sided tumors only1 (4.2)
Whenever RNI is indicated2 (8.3)
The definition of adequate LN dissection is
8 or more3 (12.5)
10 or more20 (83.3)
15 or more1 (4.2)
  • * Multiple responses allowed, CTV: clinical target volume, IMRT: intensity modulated radiotherapy, LN: lymph node, RTOG: Radiation Therapy Oncology Group, PTV: planning target volume, ESTRO: European Society for Radiotherapy and Oncology, InM; internal mammary, VMAT: volumetric modulated arc therapy, SC: supraclavicular, ECE: extracapsular extension, T: tumor, N: node