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A relatively severe form of brachyolmia with characteristics of short-trunk short stature, platyspondyly and kyphoscoliosis. Degenerative joint disease in the spine, large joints and interphalangeal joints becomes manifest in adulthood. The precise prevalence of this form of brachyolmia is not known. About 30 cases have been reported. Patients with Brachyolmia type 3 generally have a normal birth weight and length. Heterozygous mutations in the TRPV4 gene (12q24.11) are responsible. Autosomal dominant mode of inheritance.
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