What does a genetic panel test for?
Genetic testing is a type of medical test that identifies changes in genes, chromosomes, or proteins. The results of a genetic test can confirm or rule out a suspected genetic condition or help determine a person’s chance of developing or passing on a genetic disorder.
What is the most common gene responsible for deafness?
Mutations in the connexin 26 gene (on chromosome 13) are the most common genetic cause of deafness and are thought to be responsible for up to half of recessive nonsyndromic hearing loss.
Can deafness be genetic?
Hearing loss has many causes. 50% to 60% of hearing loss in babies is due to genetic causes. There are also a number of things in the environment that can cause hearing loss.
How do you know if hearing loss is hereditary?
A dominant mutation causes hearing loss if just one of the inherited copies from the parents is damaged. Recessive mutations manifest themselves as hearing loss only if both copies are damaged, i.e. if both parents are carriers of the gene mutation.
How is hereditary deafness treated?
For those suffering from hereditary hearing loss, there are very few treatment options available. The current treatment is to use an artificial cochlear implant, a device that takes over the job of the inner ear.
What genetic mutation causes deafness?
The most common cause of moderate autosomal recessive nonsyndromic hearing loss is mutations in the STRC gene. These mutations cause a form of the condition known as DFNB16. Mutations in more than 60 other genes can also cause autosomal recessive nonsyndromic hearing loss.
Is it a good idea to get genetic testing?
The obvious benefit of genetic testing is the chance to better understand of your risk for a certain disease. It can help ease uncertainty. Testing is not perfect, but it can often help you make decisions about your health.
Is there a genetic test for hearing loss?
This test is indicated for patients with any type of hearing loss of potentially genetic etiology, either syndromic or nonsyndromic, and with any mode of inheritance. Hearing loss (HL) or deafness is the most common sensory deficit in humans, affecting an estimated 5% of the world’s population.
What is the blueprint genetics non-syndromic hearing loss panel?
The Blueprint Genetics non-Syndromic hearing loss panel covers classical genes associated with sensorineural hearing loss, unilateral and bilateral, non-syndromic genetic deafness, Usher syndrome, Baraitser-Winter syndrome and Branchio-oto-renal (BOR) syndrome.
What are the inheritance patterns of deafness?
Deafness can occur in several inheritance patterns including autosomal dominant, autosomal recessive, and X-linked.
What is the prevalence of congenital hearing loss (HL)?
Congenital or pre-lingual HL is 80% genetic as compared to 20% acquired or environmental. Of pre-lingual genetic HL, 20% is syndromic and 80% nonsyndromic. Of pre-lingual genetic nonsyndromic hearing loss (NSHL), 80% is recessive, 19% is dominant, and the remainder is X-linked or mitochondrial (Shearer et al. 2017. PubMed ID: 20301607).