What is lymphoedema?
Lymphoedema (or lymphedema - U.S. spelling) is a swelling of part of the body, usually a limb. Lymphoedema can occur as a side effect of cancer treatment when lymph nodes have been removed or damaged causing lymph fluid to build up in tissue under the skin.
The lymphatic system is part of both the immune and circulatory systems which include:
Lymph fluid is a clear fluid that travels from the tissues in the body, carrying nutrients and immune cells and removing bacteria and cell debris, before being emptied into the bloodstream. This fluid is rich in proteins.
Lymph vessels are a large network of thin tubes found throughout the body. These carry lymph fluid around the body.
Lymph nodes (glands)
Lymph nodes are small structures found along the lymph vessels. Lymph nodes are located throughout the body, including the underarms, neck, abdomen, chest and groin. The lymph nodes filter the lymph fluid as it passes through the body, removing and destroying bacteria, viruses and other harmful substances.
This includes the lymph nodes, bone marrow, spleen, tonsils, thymus and some tissues in the digestive tract. The lymph tissue, lymph fluid and lymph nodes all contain white blood cells called lymphocytes, which help protect the body against infection and disease.
Symptoms of lymphoedema can include:
- visible swelling
- an aching or tingling feeling
- being unable to fully move the affected limb
- tightness or heaviness in the limb
- pitting of the skin
Causes of lymphoedema
Lymphoedema can affect people during and after cancer treatment depending on the location of the cancer, its stage and the type of treatment. Some factors that can increase risk factors of developing lymphedema include:
- certain types of cancer that affect the lymphatic system
- radiation therapy (radiotherapy) that causes scarring of the lymph nodes and vessels
- surgery to remove lymph nodes
- being overweight
- an infection in a limb that is at risk of developing lymphoedema
- some chemotherapy drugs
- an existing problem with the lymphatic system
- reduced mobility
Diagnosis for lymphoedema
If you are experiencing symptoms, your doctor will examine the affected area and assess the level of swelling and any thickening or damage to the skin. Your doctor may refer you to a lymphoedema practitioner for a full assessment. Additional tests may include:
Your limbs may be measured before cancer treatment to help determine any changes after treatment.
As some areas of the body may be difficult to measure, photographs may be taken, with consent, as a way of assessing changes in swelling.
This test uses mild electrical signals to compare how much fluid is in one limb compared to the other.
This is used to rule out blood clots as the cause of any swelling.
Treatment for lymphoedema
There is no known cure for lymphoedema but it can be managed. Lymphoedema may develop months or years after treatment. Symptoms are easier to manage if lymphoedema is diagnosed early.
It is important to find a treatment that suits your lifestyle as lymphoedema needs lifelong management. Treatment aims to improve the flow of lymph fluid through the affected area to reduce swelling. Early on, treatment may focus on elevation and exercise. Your practitioner may also suggest wearing a compression sleeve or stocking.
Daily skin care is also important as the skin provides protection against infection.
People with more advanced lymphoedema may need more complex therapy such as compression therapy, manual lymphatic drainage, laser treatment or surgery.
A lymphoedema practitioner may asses you before you have surgery and some hospitals have specialist physiotherapists who can teach you simple exercises to reduce the risk.
Risk reduction of lymphoedema focuses on surgical or radiotherapy techniques that are less damaging to the lymphatic system.
Understanding Lymphoedema fact sheet, Cancer Council Australia, © 2019.
Lymphoedema - what you need to know booklet, Cancer Australia, © 2013.
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