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Acrogeria (also known as "Gottron's syndrome"〔) is a cutaneous condition characterized by premature aging, more especially in the form of unusually fragile, thin skin on the hands and feet (distal extremities). The prefix "acro" stems from the Greek ''akros'' which alludes to "extremity, tip" while the suffix "geria" comes from the Greek ''gerôn'' which means "elder". This is one of the classic congenital premature aging syndromes, occurring early in life, among which are: pangeria (Werner's syndrome), progeria (Hutchinson-Gilford's syndrome) and acrogeria (Gottron's syndrome) and was characterized in 1940.〔Gottron, H. Familiaere Akrogerie. Arch. Derm. Syph. 181: 571-583, 1940.〕 Onset is in early childhood, it progresses over the next few years and then remains stable over time with morphology, colour and site remaining constant. A bruising tendency has been observed. It is believed that Gottron syndrome may affect more females than males. Approximately forty cases have been reported in the medical literature, since the discovery of the disorder. ==Signs and symptoms== This disorder is characterized by a reduction and loss of subcutaneous fat and collagen of the hands and feet, above all. It can be defined it as a mild, nonprogressive, congenital form of premature skin senility due to the disappearance of the fatty tissue directly under the skin. More precisely, skin lesions deal with large, fixed, geographic and symmetrical fine scaly recessive erythematous plaques distributed over the dorsal side of distal extremities. Skin lesions can be associated with osteoarticular alterations. Other outcomes and observations may include abnormally small hands and feet with unusually prominent veins on the upper trunk (chest), short stature, and, sometimes, abnormally small jaw (micrognathia). Most of the cases analyzed show atrophy of the skin at the tip of the nose, which gives a sculptural appearance. The nails may be dystrophic or thick, but, most of the time, they are normal. In the skin histopathology, there is atrophy of the dermis and subcutaneum. The collagen fibers are loose and dispersed, and the elastic fibers are always fragmented. However, the epidermis is not affected. Although some patients present clinical features similar to those of progeria and metageria, they do not usually show generalized atherosclerosis. Therefore, they do not usually have premature myocardic or coronary disease. 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「Acrogeria」の詳細全文を読む スポンサード リンク
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