Do I need radiation after successful breast cancer surgery?

Trust your doctor. I do a lot of research myself. I was able to watch the radiologist put in two mag seeds and a sentinel trace for lymph node removal & ask her questions because of it. My surgeon is doing a oncoplasic breast reduction on both breasts. I have two invasive mammary carcinomas in my breast tissue. They broke out of the duct. What I understand is the radiation and/or chemo target any microscopic cancer cells that cannot be seen on the ultrasound. Cancer is sneaky and microscopic cells can break off and travel in the body. Considerate it added insurance they get all the cancer.

Thanks for your reply. I've taken 4 out of the 4 radiation treatments. Yes, it's for preventative measures.

It could be that the biopsy removed the invasive portion and what was left was not invasive yet but was still cancer.

It's completely understandable to have questions about radiation therapy, especially when the surgical results were so encouraging. Many patients wonder about the need for additional treatment after successful surgery, and this is definitely something worth discussing thoroughly with the oncology team. Radiation after lumpectomy is a standard recommendation for most breast cancer patients because it significantly reduces the risk of cancer returning in the same breast, even when margins are clear and lymph nodes are negative. The medical team can explain how this decision applies specifically to the individual case and help weigh the benefits and potential side effects.