Axillary lymph nodes

Axillary Lymph Nodes

Diagram of the human lymphatic system, highlighting the axillary lymph nodes

The Axillary Lymph Nodes are a group of lymph nodes located in the axilla (armpit). They play a crucial role in the immune system, acting as filters for harmful substances and are a key component in the body's defense against infection and disease.

Anatomy

The axillary lymph nodes are divided into five groups: pectoral (anterior), lateral, subscapular (posterior), central, and apical nodes. These nodes are located near the large blood vessels and nerves in the axilla.

Function

The primary function of the axillary lymph nodes is to filter lymph, a clear fluid that circulates through the lymphatic system carrying cells that help fight infection and disease. They also play a significant role in the body's immune response, producing and storing cells that fight infection and disease.

Clinical Significance

The axillary lymph nodes are often examined in the diagnosis and staging of breast cancer. Enlarged axillary lymph nodes can be a sign of a systemic infection or metastasis of cancer. The removal of these nodes, known as an Axillary lymph node dissection, is a common procedure in the treatment of breast cancer.

See Also

• Lymphatic system
• Lymph node
• Breast cancer