Axillary

The term axillary is derived from the Latin word "axilla" and typically refers to structures located in or near the armpit area. Notably, in medical contexts, it often pertains to the lymph nodes located underneath the arm.

Overview

The axillary region is a vital anatomical zone located beneath the junction of the upper arm and the torso. One of its primary components, relevant to medical studies, is the axillary lymph nodes.

Axillary Lymph Nodes

The lymphatic system plays a crucial role in our body's immune defense mechanism. Axillary lymph nodes are a group of nodes in the axilla that serve as a filtering center for lymph, which originates from the arm, thoracic wall, and breast.

Structure

The axillary lymph nodes can be categorized into several groups based on their location:

• Anterior (pectoral) nodes
• Posterior (subscapular) nodes
• Lateral nodes
• Central nodes
• Apical nodes

These nodes play a significant role in draining lymph from the upper limbs, the lateral aspect of the thoracic wall, and the upper anterior and posterior walls.

Clinical Significance

Axillary lymph nodes are frequently examined in clinical settings, especially in cases related to breast cancer. Swelling or enlargement of these nodes may indicate an infection or the spread of a malignancy. During procedures such as a mastectomy, a surgeon might perform an axillary lymph node dissection to assess or treat breast cancer that has potentially spread to these lymph nodes.

See Also

• Lymphatic system
• Lymph nodes
• Breast cancer