I am a 44 years old female. I was suffering from breast cancer and got treated for breast cancer. Some of my lymph nodes also were got affected then. As treatment, I had radiation and chemotherapy, after surgical removal of my right breast. Now, after 4 years from the treatment, I am now suffering from a stabbing pain in my legs and groin. I am unable to even cross my legs. I feel pain when I breathe in. The pain is usually felt in upper leg muscle. When this pain occurs I will be unable to even lift my legs. Why this happens so? Is there any chance for a further outbreak of cancer? Please help.