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Definition of Hypochondroplasia

Hypochondroplasia: A type of short-limb dwarfism, with shortening especially of the ends of the limbs. A child with hypochondroplasia usually has a prominent forehead, mildly shortened extremities and digits, limited range of motion at the elbows, and inward curvature of the lower back. Diagnosis is made through physical examination and X-rays. Hypochondroplasia is inherited in an autosomal dominant manner. Hypochondroplasia can also occur spontaneously. The gene for hypochondroplasia is the same gene that causes achondroplastic dwarfism: the fibroblast growth factor receptor 3 (FGFR3). However, the two forms of dwarfism are caused by different mutations in FGFR3.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=9068
Last Editorial Review: 3/19/2012

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