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Primary lymphedema is a form of lymphedema which is not directly attributable to another medical condition. It can be divided into three forms, depending upon age of onset: congenital lymphedema, lymphedema praecox, and lymphedema tarda. Congenital lymphedema presents at birth. Lymphedema praecox presents from ages 1 to 35. This type of lymphedema accounts for 77%–94% of all cases of primary lymphedema. Lymphedema tarda presents after age 35. This type of lymphedema usually develops as a result of a developmental abnormality being precipitated by some insult such as trauma, illness, or physical immobility. Compared to secondary lymphedema, primary lymphedema is more likely to involve the face, conjunctiva, and genitalia in association with any limbs involved. 〔Burkhart CN, Adigun C, Burton CS. Chapter 174. Cutaneous Changes in Peripheral Venous and Lymphatic Insufficiency. In: Wolff K, ed. Fitzpatrick's Dermatology in General Medicine. 8th ed. New York: McGraw-Hill; 2012. http://www.accessmedicine.com/content.aspx?aID=56081150. Accessed November 3, 2013.〕 It can be familial. lymphedema tarda occurs in patient above 35 years of age ==References== 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「Primary lymphedema」の詳細全文を読む スポンサード リンク
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