Focused radiation therapy for prostate cancer with smaller safety margins

This trial is testing stereotactic radiotherapy — a highly focused form of radiation therapy — for men with early-stage prostate cancer. Instead of using the standard large safety margins around the tumor, this treatment uses much smaller margins, which may reduce damage to nearby healthy tissues like the bladder and rectum while still effectively treating the cancer.

Standard prostate radiation therapy uses large safety margins to ensure the entire cancer is treated, but this can cause unwanted side effects in nearby organs. This trial explores whether using smaller, more precise margins — guided by special markers placed in the prostate — can deliver the same cancer treatment with fewer complications.