Parasternal lymph nodes

Parasternal Lymph Nodes

Illustration of the lymphatic system, including the parasternal lymph nodes.

The Parasternal Lymph Nodes are a group of lymph nodes located in the thoracic cavity, specifically along the sternum. They play a crucial role in the lymphatic system, which is responsible for the body's immune response and the transportation of lymph.

Anatomy

The parasternal lymph nodes are situated along the internal thoracic artery, extending from the level of the first rib to the diaphragm. They are typically divided into two groups: superior and inferior. The superior group drains the anterior part of the thoracic wall and the anterior part of the mediastinum. The inferior group drains the diaphragm and the liver.

Function

The primary function of the parasternal lymph nodes is to filter lymph, a clear fluid that contains white blood cells, before it returns to the bloodstream. This process helps to remove bacteria, viruses, and other harmful substances from the body, thereby playing a crucial role in the immune response.

Clinical Significance

Enlargement or inflammation of the parasternal lymph nodes, known as lymphadenopathy, can be a sign of various medical conditions, including infections, autoimmune diseases, and cancers such as breast cancer and lung cancer. In such cases, further diagnostic tests may be required to determine the underlying cause.

See Also

• Lymphatic system
• Lymph node
• Lymphadenopathy