Many years ago, I recognized that individuals I regard as false prophets are unusually prone to die of cancer. I could provide a long list, but just now there’s no need. I developed a theory of an “irritable personality,” and supposed such a personality might rise from the same genetic bases as a tendency toward cancer.
From this article, it appears that I was right. Although it doesn’t give any detailed description of what might constitute a cancer-prone personality, it sets forth that, at least in some persons, the two are definitely linked.