Lymphedema
（重定向自Trophedema）
Lymphedema (lymphoedema in British English), also known as lymphatic obstruction, is a condition of localized fluid retention and tissue swelling caused by a compromised lymphatic system, which normally returns interstitial fluid to the thoracic duct and then the bloodstream. The condition can be inherited or can be caused by a birth defect, though it is frequently caused by cancer treatments, and by parasitic infections. Though incurable and progressive, a number of treatments can ameliorate symptoms. Tissues with lymphedema are at high risk of infection.