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A 51-year-old member asked:

Which genetic disorders are most common and least common?

1 doctor answer1 doctor weighed in
Dr. Dan Fisher
Internal Medicine 27 years experience
Depends: on how strictly you define things. The big ones are: familial hyperlipidemia Cystic Fibrosis Thalassemia Muscular Dystrophies Down's Syndrome Fragile X Hemochromatosis Sickle Cell Disease Alpha 1 antitrypsin deficiency. There are many many diseases of which there are only a few in the whole world and there are probably a few we haven't seen yet.

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A 40-year-old member asked:

Can you tell me about the most common genetic disorder?

2 doctor answers2 doctors weighed in
Dr. Anna-Kaisa Niemi
Clinical Genetics 16 years experience
Thalassemias: Alpha and beta thalassemias are estimated to be the most common genetic conditions. Who has a nice article and list of common genetic conditions in the world, here link for your convenience: http://www.Who.Int/genomics/public/geneticdiseases/en/index2.Html.
A 30-year-old member asked:

What are the most common genetic disorders?

1 doctor answer1 doctor weighed in
Dr. Gurmukh Singh
Pathology 49 years experience
It depends on what: You call genetic. Almost all diseases are a combination of genes and environment. Consult the following site of a list of common single gene defects.http://archive.blisstree.com/feel/ten-most-common-inherited-genetic-diseases/.
A 44-year-old member asked:

What is the most common genetic disorder in the U.S.?

1 doctor answer4 doctors weighed in
Dr. Richard Roberts
Pediatrics 46 years experience
Too complex to answer: There are Mendelian disorders: X-linked recessive, X-linked dominant, autosomal dominant, and autosomal recessive. There are genetic disorders caused by abnormal amounts of chromosomal material: trisomies, deletions, and duplications. The largest group are disorders in which there is clearly a genetic component, but non-genetic factors are also important. No easy answer.
Dr. Richard Roberts
Pediatrics 46 years experience
Provided original answer
I should also mention the great importance of epigenetic factors: those factors which can interfere with normal genetic expression--such as turning off a particular gene which should be functioning, or vice versa.
Nov 22, 2016

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Last updated Jun 1, 2015
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