
Primary Ciliary Dyskinesia 34: Unveiling the Genetic Threads of a Complex Lung Disease
Recurrent lung infections, bronchiectasis and sometimes situs inversus mark PCD34; gene testing offers a non-invasive alternative when microscopy is inconclusive.

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.

Recurrent lung infections, bronchiectasis and sometimes situs inversus mark PCD34; gene testing offers a non-invasive alternative when microscopy is inconclusive.

Gene changes behind PCD35 impair cilia and, research suggests, sinus development; screening of newborns or prenatal samples in affected families is discussed.

An enlarged, weakened left ventricle runs in families with PFDC; next-generation sequencing can name the mutation, flag at-risk relatives and shape care.

Ptosis and restricted eye movement trace back to TK2 mutations that leave multiple mtDNA deletions; confirming them separates PEO from other neuromuscular disease.

Changes in the RCBTB1 gene affect the retina and can cause vision to decline over time. Identifying the mutation supports early monitoring and genetic counseling.

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Genetic subtype matters when weighing the effects of vitamin A and E on progression, and electroretinogram biomarkers have been used to predict how RP77 advances.

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