Hunter syndrome is caused
by a defective chromosome
, and a child must inherit the defective chromosome to develop the disease. Hunter syndrome is what’s known as an X-linked recessive disease, which means that women carry the defective disease-causing X chromosome and can pass it on.
What type of mutation causes Hunter syndrome?
Rationale:
Mucopolysaccharidosis type II
(Hunter syndrome) is an X-linked multisystem disorder, caused by deficiency of the lysosomal enzyme iduronate-2-sulfatase (I2S).
How common is Hunter syndrome?
How common is Hunter syndrome? Hunter syndrome is almost always diagnosed in males. Doctors diagnose it in
roughly 1 out of 100,000 to 170,000 males
. Females can be carriers of the genetic mutation that causes MPS II.
Can you die from Hunter syndrome?
Mucopolysaccharidosis type II (MPS II or Hunter syndrome) is a progressive, multisystemic disease caused by a deficiency of iduronate-2-sulfatase. Patients with the severe form of the disease have cognitive impairment and
typically die in the second decade of life
.
Is Hunter syndrome a lysosomal disorder?
Hunter syndrome primarily occurs in boys and is one of about 50 diseases classified as
lysosomal storage disorders
(LSD). In these disorders, genetic variations disrupt the normal activity of lysosomes in human cells.
Is Hunter syndrome a terminal?
The condition is one type of a group of inherited metabolic disorders called mucopolysaccharidoses (MPSs). Hunter syndrome is also known as MPS II. There’s no cure for Hunter syndrome.
What is the life expectancy of someone with MPS?
The life expectancy of these individuals is
10 to 20 years
. Individuals with mild MPS II also have a shortened lifespan, but they typically live into adulthood and their intelligence is not affected. Heart disease and airway obstruction are major causes of death in people with both types of MPS II.
What is the difference between hurler and Hunter syndrome?
Hunter syndrome (mucopolysaccharidosis II, MPS II) is distinguished from Hurler syndrome by
an X-linked recessive inheritance
, longer survival, lack of corneal clouding, the characteristic papulonodules, and the different biochemical defect.
What is Noonan syndrome?
Noonan syndrome is
a genetic disorder that prevents normal development in various parts of the body
. A person can be affected by Noonan syndrome in a wide variety of ways. These include unusual facial characteristics, short stature, heart defects, other physical problems and possible developmental delays.
What is Hurler’s syndrome?
Hurler syndrome is
an inherited condition caused by a faulty gene
. Children with Hurler syndrome lack an enzyme that the body needs to digest sugar. As a result, undigested sugar molecules build up in the body, causing progressive damage to the brain, heart, and other organs.
What type of doctor treats Hunter syndrome?
Research is under way to find effective treatments for boys with severe Hunter syndrome. Treating the symptoms. Because so many different parts of your child’s body can be affected, you’ll probably need to see several doctors to help you manage the condition, including:
Cardiologist: a heart specialist
.
Who discovered Hunter’s syndrome?
MPS II was first described by
Charles Hunter
in 1917. This X-linked recessive disorder results from the lysosomal enzyme deficiency of iduronate 2-sulfatase (also labeled as I2S deficiency or iduronate sulfatase deficiency [ISD]).
How does Niemann Pick disease affect the body?
Niemann-Pick is a rare, inherited disease that affects
the body’s ability to metabolize fat (cholesterol and lipids) within cells
. These cells malfunction and, over time, die. Niemann-Pick disease can affect the brain, nerves, liver, spleen, bone marrow and, in severe cases, lungs.
Who is at risk for having Morquio syndrome?
The risk is
the same for males and females
. All individuals carry 4-5 abnormal genes. Parents who are close relatives (consanguineous) have a higher chance than unrelated parents to both carry the same abnormal gene, which increases the risk to have children with a recessive genetic disorder.
What disease is caused by enzyme deficiency?
Gaucher disease
is a rare, inherited metabolic disorder in which deficiency of the enzyme glucocerebrosidase results in the accumulation of harmful quantities of certain fats (lipids), specifically the glycolipid glucocerebroside, throughout the body especially within the bone marrow, spleen and liver.
Community and Support. Hunter syndrome has a considerable impact on life beyond healthcare needs, for both the child with the condition and their family. Parents and caregivers report that Hunter syndrome affects
family cohesion
, and caregivers may be more likely to experience stress and depression.
