Radiation and Li-Fraumeni Syndrome

NEW:  Radiation Exposure and Li-Fraumeni Syndrome Everyone is exposed to ionizing radiation, an invisible form of high-energy radiation, in everyday life. There are two main sources of radiation: naturally-occurring and man-made (usually medical). Naturally-occurring radiation can come from the ground and even outer-space! Examples of man-made radiation include x-rays, CT scans, and PET scans.