This study is a retrospective and prospective, single arm, real world study. For those patients who have already received the SpaceOAR treatment before study kick-off, the data at baseline and the day of procedure will be retrospectively collected. For those patients who will receive SpaceOAR treatment after study kick-off, the clinical data at baseline, the day of procedure and 30 days post procedure will be prospectively collected.
Up to 20 subjects with a pathologically confirmed diagnosis of clinical stage T1 or T2 prostate cancer indicated for radiotherapy will be enrolled, for there are chances of missing data in the real world study. A sample of 14 subjects provides at least 90% power for the primary objective.
