Using Nodal Ratios to Predict Risk of Regional Recurrences in Patients Treated with Breast Conservation Therapy with 4 or More Positive Lymph Nodes

Table 2

Radiation treatment field as a function of nodal ratio.

Ratio	Tangents alone; 𝑛 (%)	Tangents + SC; 𝑛 (%)	Total; 𝑛 (%)
LNR	3 (5)	13 (23)	16 (28)
INR	1 (2)	21 (38)	22 (40)
HNR	0 (0)	18 (32)	18 (32)
Total	4 (100)	52 (100)	56 (100)

Abbreviations/definitions: LNR = Low nodal ratio <40%; INR = Intermediate Nodal Ratio, 40%–70%; HNR = High Nodal Ratio >70%. Tangents alone: no nodal radiation intentionally delivered. Tangents + SC*: Tangents with supraclavicular field ± IM/axilla, as clinically indicated. Percentages given as a fraction of the total cohort (𝑛=56).