Question 1

How is achondroplasia inherited?

Accepted Answer

Achondroplasia is usually inherited in an autosomal dominant pattern, meaning a child can inherit the condition if just one parent carries the gene mutation. In most cases, though, the mutation happens spontaneously without a family history.

Question 2

What causes achondroplasia dwarfism?

Accepted Answer

Achondroplasia is caused by a mutation in the FGFR3 gene, which regulates bone growth. This mutation limits the formation of bone from cartilage, particularly in the limbs Source: MedlinePlus.

Question 3

How common is achondroplasia dwarfism?

Accepted Answer

Achondroplasia is the most common type of dwarfism, occurring in about 1 in every 15,000 to 40,000 births in the U.S. It affects people of all ethnic backgrounds.

Question 4

What are the characteristics of individuals with achondroplasia?

Accepted Answer

People with achondroplasia typically have short stature, shortened limbs, a larger head with a prominent forehead, and an average-sized torso. Intelligence and lifespan are often unaffected.

Question 5

Why is homozygous achondroplasia considered lethal?

Accepted Answer

Homozygous achondroplasia occurs when a child inherits two copies of the mutated gene, one from each parent. This typically leads to severe skeletal abnormalities and is usually fatal shortly after birth.

Question 6

Can achondroplasia be treated?

Accepted Answer

There is no cure for achondroplasia, but treatment may include managing complications, physical therapy, and, in some cases, surgical options. Ongoing care supports mobility and quality of life.

Question 7

Can achondroplasia be detected before birth?

Accepted Answer

Yes, achondroplasia can sometimes be detected during pregnancy through prenatal ultrasound or confirmed with genetic testing, especially if there's a known family history.

Question 8

Can achondroplasia be prevented?

Accepted Answer

No, achondroplasia cannot be prevented, especially in cases caused by spontaneous mutations. However, genetic counseling may help families understand risks and options.

Question 9

Does achondroplasia affect life expectancy?

Accepted Answer

Many individuals with achondroplasia live normal lifespans. Some may face health issues related to the spine, breathing, or joints, but these can often be managed with medical care.

Question 10

How is achondroplasia diagnosed?

Accepted Answer

Diagnosis is usually made through physical examination after birth based on visible features. Genetic testing and X-rays can confirm the presence of the FGFR3 gene mutation.

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