The main difference in edema caused by an impaired lymph system as opposed to an edema related to a heart or kidney problem is the protein content. Lymphedema conditions have a higher concentration of protein.Other differences are that the edema related to a problem with the lymph system is generally one-sided ,it is firm to the touch, and elevation is effective initially. Edema from heart or kidney problems tends to be both extremities, it is soft and doughy to the touch, and elevation is always effective.
If the patient has involvement with the lymph nodal system by the cancer he/she are at more risk for developing edema within the area that the lymph nodes drain. The lymph nodes can not only be effected by direct tumor involvement and compression by the tumor, but they can be influenced by treatments such as radiation , chemotherapy and surgery. It is not uncommon that the lymph nodes will shrink post treatment and begin to allow the area effected to rid itself of the fluid retention.
Janet Scheetz, PT