Figure 1From: Occurrence of breast cancer subtypes in adolescent and young adult womenAge-specific incidence rates of breast cancer by subtypes among California women aged 15 to 39 years, 2005-2009. Hormone receptor (HR)-positive and human epidermal growth factor receptor 2 (HER2)-negative (diamond), HR+/HER2+ (square), HR-/HER2+ (triangle), and triple-negative (X).Back to article page