Axillary lymph node

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 fight against infection and disease.

Anatomy

The axillary lymph nodes are divided into several groups depending on their location in the axilla. These include the pectoral (anterior), subscapular (posterior), lateral, central, and apical groups. Each group drains a specific area of the body, such as the arm, chest wall, or upper abdomen.

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 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. If cancer cells are found in these lymph nodes, it may indicate that the cancer has spread beyond the breast. This information can help determine the most effective treatment plan.

See also

• Lymph node
• Lymphatic system
• Breast cancer