Alternative titles and symbols : Grebe chondrodysplasia; Acromesomelic dysplasia, grebe type; Achondrogenesis, type II; Achondrogenesis, brazilian; Grebe dysplasia; AMDG; Chondrodysplasia, grebe type;
Description : Grebe chondrodysplasia is an autosomal recessive disorder characterized by severe
abnormality of the limbs and limb joints. The severity of limb shortening progresses
in a proximal-distal gradient, with the hands and feet being most affected. The fingers
and toes lack articulation and appear as skin appendages. In contrast, axial skeletal
structures and the craniofacial skeleton are not affected. Heterozygous individuals
are of average stature and have mild skeletal abnormalities (summary by Thomas et
al., 1997).;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutations in the growth/differentiation factor-5 gene (GDF5, 601146.0003);