GTR Home > Conditions/Phenotypes > Cartilage-Hair Hypoplasia-Anauxetic Dysplasia Spectrum Disorders


The cartilage-hair hypoplasia – anauxetic dysplasia (CHH-AD) spectrum disorders are a continuum that includes: Metaphyseal dysplasia without hypotrichosis (MDWH), Cartilage-hair hypoplasia (CHH), and Anauxetic dysplasia (AD). CHH-AD spectrum disorders are characterized by severe disproportionate (short-limb) short stature which is usually recognized in the newborn, and occasionally prenatally because of the short extremities. Other findings include joint hypermobility and often fine silky hair, immunodeficiency, anemia, impaired spermatogenesis, gastrointestinal dysfunction, and increased risk for malignancy. The most severe phenotype (AD), which has the most pronounced skeletal phenotype, may be associated with atlantoaxial subluxation in the newborn and may include cognitive deficiency. The clinical manifestations of the CHH-AD spectrum disorders are variable, even within the same family. [from GeneReviews]

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