What is a fatal disease other than cystic fibrosis?

Cancer is a fatal disease other than cystic fibrosis. Cancer is a group of diseases that can affect any part of the body. It occurs when cells in the body begin to grow out of control. There are many different types of cancer, and each type can have different symptoms. Some of the most common types of cancer include breast cancer, lung cancer, prostate cancer, and colon cancer. Cancer is the second leading cause of death in the United States, after heart disease.