I was also told I would qualify for 5 sessions of Accelerated Partial Breast Irradiation. Still, when I came for my first session they told me that because I lost more than 25% of my breast during the lumpectomy I no longer qualified for the 5 sessions, and would need 16. So far I am only experiencing low-level fatigue and some swelling of the affected breast. I was told that the side effects would be more likely with 16 sessions because there is more frequent exposure. I am using a prescribed steroid cream and Aquafor 2x per day. I was very upset when I found out I had to have 16 sessions but I am going every day and just counting down until I am finished.