
Decoding Alzheimer Disease 3: Understanding, Diagnosing, and Genetic Testing
An early-onset familial form of Alzheimer's, AD3 is traced to mutations in PSEN1, PSEN2 and APP, with counseling recommended before and after testing.

MD · MBA
Physician specializing in genetic analysis and personalized preventive medicine, and author of Outsmart Your Genes.
Brandon Colby is a physician-expert in the fields of genetic analysis and Personalized Preventive Medicine. He holds an MD from the Mount Sinai School of Medicine, an MBA from Stanford University's Graduate School of Business, and a degree in Genetics from the University of Michigan.
Dr. Colby is the author of the book Outsmart Your Genes and has developed numerous technologies that improve the analysis, interpretation, and actionability of genome sequencing data. He is an Affiliate Specialist of the American College of Medical Genetics and Genomics (ACMG), an Associate of the American College of Preventive Medicine (ACPM), and a member of the National Society of Genetic Counselors (NSGC).
Articles by Brandon Colby, MD are reviewed for accuracy by Sequencing's medical and scientific team. This page is for informational purposes and does not constitute medical advice.

An early-onset familial form of Alzheimer's, AD3 is traced to mutations in PSEN1, PSEN2 and APP, with counseling recommended before and after testing.

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An unbalanced translocation between chromosomes 10 and 22, plus work on oxytocin and testosterone, frames what genetic testing adds for autistic behavior.

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