To understand how far breast cancer has spread, the underarm lymph nodes are assessed. Sentinel lymph node biopsy examines only the first one to three nodes, without removing all the underarm nodes.
How is it done?
During surgery a tracer is given into the breast, which lets us find the first lymph node. The node is removed and examined in pathology. If it is clear, nothing more is done to the underarm.
If the node is involved
Not every involvement means a full underarm operation. In selected patients radiotherapy or systemic treatment may be enough; in patients who receive treatment before surgery, methods such as targeted axillary surgery can be used.
Preventing lymphoedema
- Start exercises on time and gradually.
- Keep your weight in balance.
- If you notice swelling or a feeling of heaviness in the arm, report it without delay.
Risks and points to be aware of
- Numbness, a pulling sensation or fluid collection in the armpit may occur.
- The risk of lymphoedema is lower than after a full axillary dissection, but it is not zero.
- Rarely, an allergic reaction to the tracer or temporary colour change may be seen.
Follow-up and next steps
The pathology result decides whether more treatment is needed. We explain arm exercises, skin care and early warning signs of arm swelling.
Contact us without delay if
- Swelling, heaviness or firmness of the arm
- Redness, warmth or fever in the armpit
- New pain or limited movement in the arm
Frequently asked questions
Will my arm swell after a sentinel biopsy?
The risk is markedly lower than after removing all the underarm nodes, but it is not zero.
Can I use my arm after surgery?
Yes. Controlled, gradual exercise is recommended.
