原文：

Cancer is a disease caused by an uncontrolled growth of abnormal cells in the body. There are many types of cancer, including breast cancer, lung cancer, and skin cancer. Cancer can be caused by various factors, such as genetics, environmental factors, and lifestyle factors.

重新描述：

Cancer is a medical condition that results from the uncontrollable growth of unusual cells in the body. It encompasses several types, including breast, lung, and skin cancer— among others. The disease's cause remains elusive but can be triggered by a combination of genetic, environmental, and lifestyle factors.