Family history concerns

A few years ago, my mother was diagnosed with lung cancer. Fortunately, she had surgery and there were no issues for five years. However, she was later diagnosed with pancreatic cancer and ultimately could not overcome it. A few years ago, my third older sister was diagnosed with lung cancer. Fortunately, there are still no issues, but at this point, it naturally raises concerns about family history. Since there are no special management methods, I am worried.