Please read this article in the Daily Mail (a UK newspaper) about a West End star, who had cancer. The irony was that she died very suddenly, not from the cancer itself, but from a condition that was preventable: blood clots.
(many thanks to the family of Sophiya Haque for allowing her case history and celebrity status to be used in publicising this condition.)
The little known fact is: anyone with cancer has blood that is stickier.
Apparently, tumours produce molecules called proagulants that make the blood clump together more readily.