The typical time scheme is for the lumpectomy to happen and the radiation to start 2 - 4 weeks after. The radiation is done to whole breast initially and then to the tumor bed. Most people are able to continue working during treatment and go on with their daily lives as normal. Breast radiation acute side effects mainly have to do with skin irritation, which is usually minimal. It is usually very well tolerated.
Mastectomy is a very good choice.
There is a high likelihood your mother will never hear from this cancer again. She will need to continue yearly mammograms and monthly self-exams on the other breast. Please have her discuss all of these options with her physicians. The information provided through OncoLink should not be used for diagnosing or treating a health problem or a disease. It is not a substitute for professional care.