Hi DL,
You ask " It is LD Brachytherapy that I have been 'battling' to explore. Not sure anyone knows the % chances of any particular individual having a recurrence of the cancer but whether you have radiation treatment (inc. Brachytherapy) or a radical prostatectomy there is a risk that the cancer can return, usually I told this is 10 - 15 years after treatment."
My understanding from reading is ;
The chances of needing further treatment after surgery are around 30%.
After R/T around 40%
Surgery recurrence is usually seen quite quickly after as the psa is an excellent marker in that if it goes above about 0.1 and continues to rise, then further treatment is required. Usually R/T if thought local.
With R/T recurrence it is usually around a three to eight year period with psa again being the marker. Local salvage treatment may be offered but more often it is just HT. If you get to ten to fifteen years out then the chances of recurrence would be much smaller by then. Same with surgery.
With Brachy, there are a couple of weak points & maybe why some consultants have strict cut-off for suitability.
One is the aggressiveness of the tumour. ( Gleason & psa figures ) in that each seed is strong enough ( enough radioactivity ) to actually destroy every bad cell.
Another is volume ( size ) of the prostate. The danger is that a gap occurs between the seeds allowing cells to escape. Sometimes more seeds are used but it is a risk. Each seed only covers a certain area or distance.
Obviously, if on the margin then again the seeds may miss cells.
This is not to put you off your chosen treatment by any means but just to make you aware of some points.