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Elephantiasis is caused by obstruction of the lymphatic system, which results in the accumulation of a fluid called lymph in the affected areas. Functioning as part of the immune system, the lymphatic system helps to protect the body against infection and disease.
Causes. Elephantiasis is caused by obstruction of the lymph vessels of the lymphatic system. As lymph moves through the lymphatic system, it is filtered by a network of small structures known as lymph nodes that help to remove microorganisms (e.g., viruses, bacteria, etc.) and other foreign bodies.