Hi Armourginger,
Welcome to the club and sorry you've had to join!
I had a spacer fitted before 15 sessions of EBRT and then 1 of HDR brachytherapy. The time line for me was:
16/10/2024 - Spacer procedure
22/10/2024 - Planning scan
13/11/2024 - EBRT started
The spacer was very similar to the biopsy though over a lot quicker: undignified positioning, ultrasound up your bum, some anesthetic needles, then needle to insert the gel spacer. It was all very straight forward and I suffered no complications.
There's no way of knowing how much difference it made, however I had no big issues during the EBRT, a bit more tired, slightly more windy with some mucus (nice!), I'm hoping it has spared me worse long term issues and happy I went ahead with it.
All the best for your treatment, let us know how you get on
John