If a man is young (under the age of 62), he should have surgery because he will do better.
Published data has demonstrated brachytherapy to be an excellent and equal treatment option for younger patients. There is no scientific data to suggest younger patients have better cure rates with surgery. This has long been a misconception. In fact, there are numerous studies that show that there are no differences in cure rates with young patients (age 62 or less), versus older patients, and all treatment options should be offered to patients.
A recent study concluded that among patients with prostate cancer treated with a mono-therapeutic approach, better urinary continence was exhibited in those who underwent radiation-based therapies. Furthermore, higher sexual function score were seen in men who selected brachytherapy.