Figure 2From: Occurrence of breast cancer subtypes in adolescent and young adult womenProportion of breast cancer subtypes among California women by age group, 2005-2009. Hormone receptor (HR)-positive and human epidermal growth factor receptor 2 (HER2) negative (blue), HR+/HER2+ (red), HR-/HER2+ (green), and triple-negative (purple).Back to article page