Professor Mark Baker, director of Nice's Centre for Clinical Practice, says that the "surveillance" protocol for men with slow-growing prostate cancer would involve "regular check-ups" instead of "radical treatment".
Prostate cancer can be very slow growing and whilst many men will have a cancer that won't cause them any harm in their lifetime, nearly 10,000 men still die every year in England and Wales.
The updated guideline includes a number of new recommendations on the swift diagnosis and treatment of different stages of the disease and a new protocol for men who choose active surveillance, which involves regular check-ups to see if and how the cancer is developing, rather than radical treatment.
More top news
Wet and windy for a time across many areas through this evening
The US president is losing another of his key aides in the latest of a string of high-profile departures.
Sir Bruce entertained audiences for more than seven decades.