Lymph nodes are small, round organs of the lymphatic system that support proper functioning of the immune system. They help the body to fight off infection by filtering foreign particles out of lymph, ...

Your lymphatic system filters waste, runs your immune defense and has no pump. Here's what doctors say keeps it moving.

The lymphatic system has long been considered mysterious. But the lymphatic system – and the lymph nodes within it – plays fascinating and important roles in health and disease, from fighting off ...

Your lymphatic system controls immunity, absorbs key vitamins and has no pump. Most people have no idea how much it does.

A 2026 study found lymphatic vessels running through the spine. Here's what that means for fatigue, brain fog and daily ...

The popliteal lymph nodes lie in the tissues behind a person’s knee. Infections and autoimmune conditions can cause them to swell. It is rare for cancer to affect the popliteal lymph nodes. According ...

Cancer that starts in the lymph nodes is lymphoma. Cancer may also spread from other areas of the body to various lymph nodes, including the neck. Swollen lymph nodes are usually due to a cause other ...