We worry therefore we are. And that’s why we invented early detection for many diseases that we really don’t need to know about.

In fact my mother, who’s no slouch in the worry department, told me recently that early detection of many tumors is often harmful because in the vast majority of cases, whatever is detected usually goes away by itself.

In other words the body’s always making tumors but hardly any of them ever cause trouble with us — until we make trouble with them.