Figure 1

Distribution of intrinsic subtypes by lymph node status. Subtype frequencies were significantly different (P < 0.05) between groups, with lymph node negative tumors (top chart) having a higher frequency of luminal A tumors while node positive tumors (bottom chart) had higher frequencies of luminal B and HER2-enriched tumors. Frequencies of normal-like tumors were <1.0% for each group.