Understanding
Hypochondroplasia
Comprehensive information, compassionate support, and a caring community for individuals with Hypochondroplasia, their families, and medical professionals.
WHAT’S Hypochondroplasia?
The Genetics Behind Hypochondroplasia
FGFR3 gene
Hypochondroplasia is caused by changes (mutations) in the provides instructions for making a protein called fibroblast growth factor receptor 3. This protein plays a crucial role in bone development, particularly in controlling how cartilage turns into bone during growth.
How Mutations Cause Problems
The mutations in FGFR3 cause a gain-of-function effect, meaning the protein becomes overactive. This overactivity interferes with normal bone development, leading to the characteristic features of hypochondroplasia.
Common Mutations
The majority of hypochondroplasia cases result from a specific mutation called p.Asn540Lys. However, researchers have identified several other mutations that can cause the condition.
Inheritance Pattern
Hypochondroplasia follows an autosomal dominant inheritance pattern. This means:
- Only one copy of the mutated gene is needed to cause the condition
- If one parent has hypochondroplasia, each child has a 50% chance of inheriting it
- However, about 70% of cases are “de novo” (new mutations) occurring in families with no previous history
“Understanding is the first step toward acceptance — and awareness begins with knowledge.”
Rare doesn’t mean invisible. Let’s talk about Hypochondroplasia.
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