Yes, exposure to certain types of radiation can be a cause of cancer. This includes ionizing radiation such as from x-rays, gamma rays, and certain types of radioactive materials. Prolonged or high levels of exposure to radiation can damage cells and DNA, leading to mutations that can result in cancer. However, it is important to note that not all types of radiation exposure will necessarily lead to cancer, and there are many other factors that can contribute to the development of cancer as well.