A lymph node biopsy is often done during your breast cancer surgery ... We may need to remove most or all of the lymph nodes in the armpit. Your doctor will talk with you about the next steps. When ...

The only way to know if you have cancerous lymph nodes, however, is for a healthcare provider to do a biopsy. Can deodorant cause lumps under the armpit? Deodorant doesn't cause lumps in the armpit.

Women having surgery for breast cancer often also have what’s called a sentinel lymph node biopsy where a few lymph nodes in the armpit are removed to check for spreading cancer.