Why Axillary Lymph Nodes Matter in Breast Cancer

Many people may have felt a small lump in their armpit or seen test results indicating enlarged armpit lymph nodes, and wondered if it's dangerous or if it's related to cancer.

The truth is, the axillary lymph nodes are one of the most important structures, particularly in evaluating breast cancer and many infectious diseases.

What Are Axillary Lymph Nodes?

Axillary lymph nodes are lymph nodes located in the armpit area. They function as...

• immune filters
• removing waste and pathogens
• receive lymphatic drainage from
  • breast
  • arm
  • lateral chest wall

Therefore, it is an important point that doctors use to assess many abnormalities.

Why Are They So Important?

1. First Site of Breast Cancer Spread

In breast cancer patients axillary lymph nodes are often...

• the first location where cancer cells spread
• Their involvement helps determine cancer stage and prognosis

If no cancer is found in the lymph nodes, the chances of controlling the disease and achieving a successful treatment are higher.

2. Guides Treatment Decisions

The status of axillary lymph nodes influences...

• surgical planning
• chemotherapy
• radiation therapy
• and targeted or immunotherapy option

Doctors therefore place great importance on this point.

3. Sentinel Lymph Node Biopsy

The sentinel lymph node is the first node receiving lymphatic drainage from the tumor.

• If cancer is not found in this node, complete lymph node removal may be avoided
• reducing complications such as lymphedema.

4. Not Always Cancer

Enlarged axillary lymph nodes can result from

• infections
• inflammation
• arm wounds
• recent vaccinations

Therefore, enlarged lymph nodes ≠ not always cancerous, but they need to be evaluated by a doctor.