I don't understand why anyone refuses any sort of cancer screening tests. It's madness. A few days of worrying about forthcoming results is better than finding out when it's too late. My husband has recently been for the Triple A (Abdominal Aortic Aneurysm Screening Programme) which checks your aorta from top to bottom, looking for any inflammation or weak spots. He self-referred and was given his results there and then. He was motivated to go after my dad died suddenly of an aortic aneurism aged 72, which had no symptoms, and is known as the Silent Killer.
http://aaa.screening.nhs.uk/