What causes fragile X syndrome?
Fragile X syndrome (FXS) is a genetic disorder. FXS is caused by changes in a gene that scientists called FMR1 gene when it was first discovered. The FMR1 gene usually makes a protein called FMRP. FMRP is needed for brain development.
What causes Martin-Bell syndrome?
Fragile X syndrome (FXS) is an inherited genetic disease passed down from parents to children that causes intellectual and developmental disabilities. It’s also known as Martin-Bell syndrome. FXS is the most common hereditary cause of mental disability in boys. It affects 1 in 4,000 boys.
Who has fragile X syndrome?
The fragile X syndrome affects about 1 in 4,000 males and 1 in 6,000 to 8,000 females in the USA; that is, it affects about twice as many males as it does females. However, about four times as many females appear to be carriers of the altered gene as do males (1:250 females and 1:1000 males).
How does fragile X affect a person?
Children and adults with full mutation fragile X may have problems with memory, abstract thinking, problem solving, and planning. Social and behavior problems, difficulty with learning, developmental delays, and autism spectrum disorder are common, as are anxiety and depression.
What is Jackson Weiss syndrome?
Jackson-Weiss syndrome (JWS) is a rare genetic disorder characterized by distinctive malformations of the head and facial (craniofacial) area and abnormalities of the feet. The range and severity of symptoms and findings may be extremely variable, even among affected members of the same family.
What is antley Bixler syndrome?
General Discussion. Antley-Bixler syndrome is a rare genetic disorder that can cause structural changes of the skull, bones of the face and other skeletal abnormalities. The disorder is typically associated with premature closure of joints (cranial sutures) between particular bones of the skull (craniosynostosis).
What is Saethre Chotzen syndrome?
Saethre-Chotzen syndrome is a genetic disorder characterized by varied and broad skull, face, and limb anomalies. TWIST gene mutations are responsible for causing the early fusion of the skull.
What is Nager Miller syndrome?
Collapse Section. Nager syndrome is a rare condition that mainly affects the development of the face, hands, and arms. The severity of this disorder varies among affected individuals. Children with Nager syndrome are born with underdeveloped cheek bones (malar hypoplasia) and a very small lower jaw (micrognathia ).
How often does Saethre Chotzen syndrome occur?
Saethre-Chotzen syndrome happens in 1 of 25,000 to 1 of 50,000 newborns.
What is Townes Brock syndrome?
Townes-Brocks syndrome (TBS) is a genetic condition caused by a harmful change (mutation) in a gene called SALL1. Features include no anal opening (imperforate anus) and differently shaped ears and thumbs. There can also be problems with the feet, heart and kidneys.
How rare is Saethre-Chotzen syndrome?
Saethre-Chotzen syndrome has an estimated prevalence of 1 in 50,000 people.
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