My testicular cancer operation was 23 years ago today. I wouldn't have had those 23 years (buying a flat/making films/writing plays/changing career/singing in 2 different choirs/joining the Proper Blokes Club walking group/making lots of new friends) if I hadn't said to a doctor, 'Actually, there is something else ...'
Self-checking and 'listening to your body' are good things to do and, hopefully, the days when being stoic and 'not telling anyone' are over. Women have been better than this than men since time began; now men are catching up. Check your bits, guys! Find something? Tell someone.