Figure 7From: Clinical, imaging, and pathological heterogeneity of the Alzheimer's disease syndromeProposed framework for Alzheimer's disease subtypes. Bubbles represent subpopulations of Alzheimer's disease (AD) by subtype, located along each of the three axes of heterogeneity: age of onset, apolipoprotein E status, and co-pathology. Exact size, positioning and degree of overlap for each subtype remain uncertain areas of active research.Back to article page