The lymphatic system, made up of lymphoid tissues known as nodes and vessels, is part of the human immune system. It is involved in protecting the body against infection, by delivering immune cells, ...

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 ...

Usually, swollen chest lymph nodes are too deep in the chest for a person to feel them. Any swollen lymph nodes in the chest appear on imaging scans. Swelling can indicate an underlying condition.