You might get more responses if you add (cut and paste) your above post into your first post/thread in the Diagnosis/Being Diagnosed.... section.
Lyn and Sandra and other regulars with the knowledge you need check there, this section gets less traffic?
Were you given the name of a Specialist Nurse to contact to get information and advice at the hospital. She will be able to tell you about the diagnosis and MRI scan
You can speak to a Specialist Nurse from PCUK, 0800 074 8383, this site, for general information and excellent free books explaining different areas. They can tailor a Toolkit to your needs, or download them direct from the website.
Members have posted high PSAs, 1000, and after hormone treatment now 1.1.
One legend on the Forum had a PSA of 13,000 and going strong.
I had hormone therapy so can explain a bit. The tablet (Bicalutamide? or similar) is taken for 3 weeks before the implant is injected, Mine was Zoladex. The tablets stop a reaction, called flare, to the injection. The hormone bring the PSA down and reduce the size of the tumour.
Please speak to the hospital Specialist Nurse, they have the info to explain and copy your post to the Diagnosis section as above.
Best wishes. G