Hello Robert, and welcome to the forum that no one wants to join. I am familiar with the tender rectum you describe, and I had similar symptoms starting with my biopsy, and not ending until a month after my surgery. I had an open RRP on July 21, 2010. At this point, I feel as good as before I even knew I had PCa. (except for this little thing we call ED)
What I'm confused about is your treatment protocol. With no capsular penetration, and negative margins, I don't understand why you are going through RT. The only evidence that "a few cancer cells escaped" would be the path report showing positive margins. Did you have positive lymph nodes?
T2C tells us that you had cancer in both lobes of the prostate. Gleason 3+3=6 is not an aggressive PCa such as what I had. Even the hormone therapy is very controversial for a G6. Can you provide more details of your post surgery pathology?
Now, back to the rectal soreness. I'm not sure if what you are experiencing and what I experienced is the same. Since the prostate sits right on top of the rectum, there is much pushing, shoving and detail surgery around the rectum which is required to get the little bugger out. (Ever skinned a rabbit?) When I mentioned my rectal discomfort to my surgeon immediately after surgery, his comment was; "We used your rectum like a punching bag for a while......I expect you are a little tender there.......Give it a few weeks, and don't sit in hard chairs...."
The first time I rode in a vehicle about ten days after surgery, still carrying that catheter, it was most uncomfortable....even to the point that I bought a hemorrhoid donut to sit on. It did not help much however. A few weeks later, I noticed that it didn't hurt any longer. Today, I can sit in hard chairs again.
Your surgery was a month before mine was, and you should be healed up by now. I would give it another month, and then pressure your surgeon for answers.
Age 57 at Dx
5/09 PSA 2.26
6/2010 PSA 3.07 FPSA 18% DRE +
6/2010 Bipsy, 7 of 12+, >60%, 4+5=9
7/21/2010 - RRP
Nodes neg,Ves neg
tumor contained, still 4+5=9
9/3, 2010 PSA - 0.04
9/3/2010, I'm 99% continent
10/14/10, PSA still 0.04, and lupron #1, now 99.9% continent
Total ED, 3 caverject failed, pump sux
10/20/10 OD'd on trimix, after 3hrs, neo synephrine shot