The pectoral (anterior) axillary nodes are three to five nodes along the lower border of the pectoralis minor and the lateral thoracic vessels, on the medial wall of the axilla. They are the main collecting nodes for the breast.
| Location | Medial wall of the axilla along the inferior border of pectoralis minor and the lateral thoracic vessels (level I) |
|---|---|
| Receives lymph from |
|
| Lymphatic drainage |
Filter lymph from the breast and anterior trunk wall.
These nodes are commonly where sentinel nodes for breast cancer are found. They are felt by pressing against the anterior axillary fold and chest wall. Lateral breast tumours and the axillary tail of the breast drain readily to them.
Breast cancer cells reaching the first draining node, often within the pectoral group.
Enlargement from breast infection such as lactational mastitis or abscess.
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