new cancer threat

I have had 3 cancers, each about ten years apart. Recently while discussing this with one of my Doctors, he said that it is widely thought that if you have one cancer it is more likely you will have another.
Best wishes.
Duke

Has anyone experienced a diagnosis of another type of cancer while being followed for bladder cancer? My husband is 3 years past invasive BC, with ileal conduit, and now had surgery for a malignant Sarcoma on the vena cava.(unrelated to BC) It has been a tumultuous battle , and now facing a new threat!