
Decoding the Knops Blood Group System: Understanding, Diagnosing, and Genetic Testing
Discover the Knops Blood Group System, its role in disease susceptibility, and how genetic testing aids in diagnosing conditions for personalized medicine.

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.

Discover the Knops Blood Group System, its role in disease susceptibility, and how genetic testing aids in diagnosing conditions for personalized medicine.

Stiffness, spasms and weakness in the legs can have genetic causes; research covers IFIH1, ABHD16A, PNPLA6, HACE1, GLRX5 and ELP2 variants linked to spasticity.

Visible blood in the urine in under-20s often follows poststreptococcal glomerulonephritis or infection, but collagen type IV variants and Alport syndrome are covered.

Discover the role of genetic testing in diagnosing and managing Macular Corneal Dystrophy Type II, a rare eye disorder. Learn about its genetic causes, treatment options, and…

Blurred vision and reduced color perception mark this group of inherited macular disorders; genes such as CFAP410 and IMPG2 help confirm which type is present.

A smaller, more spherical lens brings nearsightedness, astigmatism and lens dislocation; ADAMTSL2 and LTBP-2 findings help distinguish related acromelic dysplasias.

Two phenotypes are described, rapidly progressive acute liver failure and a slower chronic course leading to cirrhosis, with TRMU and Lrpprc among the genes involved.

Discover the complexities of mitochondrial inheritance disorders, the importance of genetic testing for accurate diagnosis, and its role in treatment and family planning.