Doctor insights on:
Apc Gene Deletion Or Duplication
From a medical standpoint, "genetic" refers to the potential heritability of various medical conditions. While some conditions are inevitable (at some point in one's life) as a consequence of simple genetic heritability (eg huntington's disease), a large number of medical conditions (including all behaviorial health disorders) are the expressed final pathway of a ...Read more
Should I screen my children for ovarian cancer genes since it seems to be so deadly? There is no history in my family.
What is the difference in gene sequencing tests vs gene deletion/duplication tests? Should one type of genetic test be done before the other?
Depends: Sequencing is like reading war and peace letter by letter, and deletion/duplication testing is like seeing if a chapter is completely missing or present as an extra copy. Which first? Depends on the condition. For duchenne muscular dystrophy, look for deletions first. For brca, sequence first. Your clinical geneticist can discuss the strategy with you. ...Read moreSee 1 more doctor answer
Would a standard genetic test detect 22q11.2 deletion syndrome? My son had genetic testing done at 2 yo.
Standard genetic ?: There are thousands of genetic related tests I am aware of and each has its uses for specific cases. A simple chromosome study would not pick up this deletion.A high resolution study would likely find it in most specialty labs.Some also do a specific study using a genetic probe.This is a question best answered by the folks who did the study in question. ...Read more
22q11 deletion: 22q deletion could be any deletion on chromosome #22, in the q arm of chromosome. Each chromosome has a short (p) and a long (q) arm. On both arms many areas that can be deleted. The most common is the 22q11 deletion syndrome which is variable ranging from perhaps mild learning difference to congenital heart defect, immunodeficiency, or hypocalcemia (low blood calcium). Many genes are involved. ...Read more
My son had genetic testing when he was 2. I just read about 22q11.2 deletion syndrome. Would that be detected from standard genetic testing?
It would now, from a: Chromosomal Microarray, molecular genetic testing that is standard of practice for geneticists & developmental pediatricians for infants & children with developmental delays &/or Autistic Spectrum Disorder. A standard karyotype would not have identified a small sequence of deleted genes at 22q.11.2., only a FISH test of Chromosome 22 in the VCF region., done if there was clinical suspicion. ...Read moreSee 1 more doctor answer
Can karotyping detect 22q11.2 deletion syndrome? What is the standard pediatricians use if they are testing for genetic disorders?
No: Usually for a 22q11.2 syndromes, a diagnostic technique called FISH is performed. There are numerous ways to detect genetic issues and the diagnostic modality will depend on what one is looking for. This may include simple karyotyoing to more sophisticated gene sequencing. A genetic counselor may be able to help you. ...Read more
Would karotyping detect 22q11.2 deletion syndrome? What standard do most pediatricians use when doing genetic testing on a 2 year old?
My 2 1/2 yr old daughter has a genetic disorder called vcfs (22q11.2 deletion syndrome) with this she has an IgA deficiency which has manifested as recurrent bronchitis. Whats a good website for info?
The VCFS Educational: Foundation has webinars. Their conference for parents and professionals is in my home town this year. I couldn't resist adding the iconic photo. If your child has adhd, as is very common in people with vcfs, just know that circus circus can be an overstimulating environment for any child....Or adult. ...Read moreSee 3 more doctor answers
Everything: Genes are entirely responsible for how we look, sound, and even taste and hear. We are a combination of things passed down through our genes from our previous generations. Most of your traits are not simply one from one parent and another from the other, but multiple possibilites of gene combinations. ...Read more
Research has focused: On genetic variations that offer a physiological advantage such as high levels of HDL ty. Cholesterol. But researchers at albert einstein college of medicine and ferkauf graduate school of psychology of yeshiva university have found that personality traits like being outgoing, optimistic, easygoing, and enjoying laughter as well as staying engaged in activities may also be part of the longevi. ...Read more
It's variable: For any given disease, there is a contribution of genetics, environment, diet and development. For rare genetic syndromes like pku, the genetic component is 100% while in type ii diabetes, genetics is about 45%. I do not recommend whole genome screening as that is often too much information to make rational decisions. I would suggest genetic susceptibility testing for specific conditions. ...Read more
What amount of intelligence is determined by genes and how much of it is determined by environment?
Genes vs environment: Too complex to answer here. No one really knows. ...Read more
Multiple Factors: There are some know genetic causes of autism - the most common of these is fragile x syndrome. However, many childrent with autism have no known genetic problem. Genetic difficulties play a role, but there are other environmental factors that are suspected to play a role as well, such as environmental toxins and even the possbility of viral illnesses. Obviously, there is still much to learn. ...Read moreSee 1 more doctor answer
There are: literally millions of genes that control cell growth not only in pancreatic tissue but throughout the entire body. Why do you ask? ...Read more
Genomic or genetic?: There are many new tests available now. Also the number of conditions or diseases being detected is larger. It is difficult to understand the implications of testing without having an expert provide perspective. A good start is asking relatives about health problems or becoming a 'medical detective' looking into old records. Then, if the family agrees, consult a clinical geneticist about testing. ...Read moreSee 2 more doctor answers