Dyscalculia

high, broad forehead and square jaw. Originally believed to be a variation of achondroplasia, researchers now recognize it as a distinct condition with its own characteristics.

Spondyloepiphyseal dysplasias This is a very large group of skeletal conditions causing short-trunk dwarfism characterized by abnormal growth in the spine and long bones of the body. In one form (spondyloepiphyseal dysplasia tarda), the lack of growth in the trunk may not become obvious until the child is between five and 10 years old. On the other hand, the characteristics of children with spondyloepiphyseal dysplasia congenita (short neck and trunk and a barrel-shaped chest) are apparent at birth.

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