Can you still get cancer even if you have a double mastectomy?

Low Probability: The goal of mastectomy is to remove as much breast tissue as possible, however, there is always a small amount left behind. Therefore, there is a small probability of breast cancer even after a double mastectomy. Of course, if the mastectomy was performed to treat a cancer, the chance of recurrence elsewhere in the body is unaffected by choice of surgical treatment.

Yes: Breast cancer can develop after mastectomy as it is not possible to remove every single cell; cancer can develop in the muscle or in the skin. It is not common however, and can happen about 1-3% of the time. If you have had a mastectomy you should still have regular physical exams and report any new lumps; mammograms are not usually performed.