what is familial alzheimer's disease
What is Familial Alzheimerâs? Familial Alzheimerâs disease (FAD) is a rare form of Alzheimerâs that is entirely passed down through family, being inherited from a parent. FAD accounts for between 2-3% of all cases of Alzheimerâs and usually has a much earlier onset than other types of Alzheimerâs, with symptoms developing in their 30s or 40s.