Posted 5/28/2014 2:44 PM (GMT -7)
Apparently 3T MRI isn't very sensitive for small things, but has good specificity. If it sees even a hint of it, it's probably there.
My tumor load was pretty significant, all 6 cores positive on one side, and it was quite visible on the 3T MRI with contrast, Diffusion Weighted Imaging. Bulging capsule, extracapsular extension, neurovascular bundle involvement, all that fun stuff that just makes one's day. It did not show anything happening in seminal vesicles or lymph nodes, though the tables say I had a 40% likelihood of lymph node involvement. So, we zapped those too even though they didn't show on the 3T MRI. In summary, if seen, bad. If not seen, unknown, maybe bad, maybe good.
I presume the same pattern would hold for SRT application of it too.
IGRT by IMRT, 44 done 8/28/13: 50.4 Gy pelvic nodes, 79.2 Gy prostate
ADT2 3 yrs: Lupron/Casodex 5/1/13
Age 56: 55@Dx 4/16/13-
Bx 6/12 pos G9=5+4 (80%, 60%), 4+5 (2 at 100%, 80%, 10%), PNI+
3T MRI: Bilateral EPE, NVB+, SV-, LN-, cT3a
Date PSA fPSA
2/6/14 <0.01, T<10
8/13 <0.1 (ADT2, post-RT)
3/13 5.2 12% PCA3=31
9/12 4.1 15%