Two years ago I had a growth on my left testicle*. During the process of seeing the doctor, having a scan, waiting for the diagnosis and then treatment, I decided not to worry. If it turned out to be cancer, then worrying wouldn't have helped. If it turned out to be benign, then worrying once again wouldn't have helped. It was benign.
* I looked like I was the inspiration for the limerick, 'There was a young man from Devizes'!