(limf’e-de’mah)-swelling due to obstruction or destruction of lymphatic vessels or lymph nodes. An example would be arm swelling after breast & armpit lymph node removal for breast cancer. Lymph is a clear fluid containing protein & white blood cells. It flows back from the extremities in lymph vessels & mixes with vein blood near the heart. After passing through the heart & lungs it travels back to the extremities in arteries. This flow of lymph increases when the extremity is injured or infected. The treatment for lymphedema is compression garment application & deep massage of the tissue to facilitate flow in the lymphatic vessels. Lymph nodes are nodules present in certain parts of the lymphatic vessels. They are the site of white blood cell replication.