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Duane-radial ray syndrome is a rare disorder that affects the eyes and causes abnormalities of bones in the arms and hands. ==Presentation== The name of the condition refers to the two elements which most commonly present: * This condition is characterized by a particular problem with eye movement called Duane anomaly (also known as Duane syndrome). Duane anomaly results from the improper development of certain nerves that control eye movement. This condition limits outward eye movement (toward the ear), and in some cases may limit inward eye movement (toward the nose). As the eye moves inward, the eye opening becomes narrower and the eyeball may pull back (retract) into its socket. * Bone abnormalities in the hands include malformed or absent thumbs, an extra thumb, or a thumb that looks like a finger. Partial or complete absence of bones in the forearm is also common. Together, these hand and arm abnormalities are called radial ray malformations. People with the combination of Duane anomaly and radial ray malformations may have a variety of other signs and symptoms. These features include unusually shaped ears, hearing loss, heart and kidney defects, a distinctive facial appearance, an inward- and downward-turning foot (a clubfoot), and fused vertebrae. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Duane-radial ray syndrome」の詳細全文を読む スポンサード リンク
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