Short answer · Medically reviewed summary · Last updated: 2023-07-13
Cartilage-hair hypoplasia (CHH) is a rare genetic disorder that affects the development of cartilage and hair in the body. It is inherited in an autosomal recessive manner, which means that both parents must carry a copy of the mutated gene for their child to be affected. The gene responsible for CHH is called RMRP, and mutations in this gene lead to the characteristic features of the disorder.
Is Cartilage-hair hypoplasia (CHH) hereditary?
Is Cartilage-hair hypoplasia (CHH) hereditary? The genetic component explained in plain language, reviewed against medical sources, with patient experiences.
Cartilage-hair hypoplasia (CHH) is a rare genetic disorder that affects the development of cartilage and hair in the body. It is inherited in an autosomal recessive manner, which means that both parents must carry a copy of the mutated gene for their child to be affected.
The gene responsible for CHH is called RMRP, and mutations in this gene lead to the characteristic features of the disorder. Individuals with CHH have short stature, a form of dwarfism, due to the impaired growth of their bones. They also have sparse and fine hair, which may be lighter in color than usual.
Since CHH is a hereditary condition, it can be passed down from generation to generation. If both parents are carriers of the mutated RMRP gene, there is a 25% chance with each pregnancy that their child will have CHH, a 50% chance that the child will be a carrier like the parents, and a 25% chance that the child will not inherit the gene at all.
It is important for individuals with a family history of CHH or those who suspect they may be carriers to seek genetic counseling. Genetic testing can help determine the risk of passing on the condition and provide information for family planning decisions.
