Down syndrome (trisomy 21) – causes, symptoms, diagnosis, & pathology

What is Down syndrome (trisomy 21)? Down syndrome is a set of symptoms that arise from a genetic abnormality, in which an individual’s cells have an extra copy of chromosome 21. Subscribe – https://goo.gl/w5aaaV. More videos – https://goo.gl/UhOKiM. Support us on Patreon – https://goo.gl/ZGHEk4.

This video covers the three main mechanisms leading to trisomy 21—nondisjunction, Robertsonian translocation, and mocaicism, as well as the more common complications and physical characteristics.

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Resources:
Robbins Basic Pathology (text)
First Aid (text)
Biology—the dynamic science (text)
http://www.uptodate.com/contents/down-syndrome-clinical-features-and-diagnosis?source=search_result&search=down+syndrome&selectedTitle=1~150
http://emedicine.medscape.com/article/943216-overview#a5
https://en.wikipedia.org/wiki/Down_syndrome
https://en.wikipedia.org/wiki/Nondisjunction
https://en.wikipedia.org/wiki/Robertsonian_translocation

Credits:
Script/audio/visuals: Tanner Marshall, MS
Reviewer: Rishi Desai, MD, MPH

Attributions:
Blood squirt sound effect by Mike Koenig – http://soundbible.com/828-Blood-Squirt.html