<unk>  is a birth defect characterized by an underdeveloped chest muscle and short webbed fingers on one side of the body. There may also be short ribs, less fat, and breast and nipple abnormalities on the same side of the body. Typically, the right side is involved. Those affected generally have normal movement and health. The cause of<unk>  is unknown. One theory is that it is due to disruption of blood flow during embryonic development. It is generally not inherited from a person's parents, and no genes that contribute to the disorder have been identified. Diagnosis of<unk>  is based on its symptoms. Often, those with the syndrome remain undiagnosed, and some may not realize they have it until puberty. Treatment of<unk>  depends on its severity and may include surgical correction. The syndrome affects about 1 in 20,000 newborns, and males are affected twice as often as females. It is named after English surgeon Sir Alfred<unk> , who described the condition when he was a student in 1841.
Poland syndrome
Möbius syndrome
Rett syndrome
Hanhart syndrome
Pallister–Hall syndrome
Robinow syndrome
Krabbe disease
Foster Kennedy syndrome