Turner Hypoplasia is a rare genetic disorder that affects the development of the body's organs and tissues. It is a form of dysplasia, which means abnormal development. The disorder is caused by a mutation in a gene located on the X chromosome, which is one of two chromosomes found in females. People with Turner Hypoplasia have a disorder of the skeletal system, as well as developmental delays in other areas. Common signs and symptoms of Turner Hypoplasia include short stature, webbed neck, low muscle tone, a high-arched palate, and a wide, shield-shaped chest. In some cases, the disorder can lead to heart defects, hearing loss, and other physical and mental health problems. Treatment for Turner Hypoplasia can include physical therapy and medications to help improve muscle control and strength.