Hi. If you're referring to radiation treatment in breast cancer, it can be given around 4-5 weeks after a major surgery (such as lumpectomy in early breast cancer) to allow the operative wound time to heal properly. If it's going to be given after chemotherapy, it's usually given around 3 weeks after the chemotherapy session. This is to allow the patient's body, particularly her blood cells, to recover from the effects of the chemotherapy.
Hi.
Radiation treatment for breast cancer should begin 4 weeks after the completion of adjuvant systemic chemotherapy or 2 to 4 weeks after surgery. Radiation treatment is delivered daily for 5 days per week.
Hope this helps.