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Satisfactory results can occur with a positive margin and Gleason 6 but there are several factors that could lead to differing results.
Before anybody chooses surgery, we always mention that physician experience is important. If this surgeon has extensive experience (1000+ procedures with the techniques he plans to use) then I would ask why he feels that surgery is still a viable option. One possible answer is that he suspects that he can either acheive desirable results or another possible answer is he suspects that the disease may have a more aggressive grade. In any case, where to go from here with prove to be controversial regardless of choice.
Do you know what technique the urologist used to determine that there was likely a positive margin? It is very rare for a clinical diagnosis to be a stage 3 diagnosis.
Advanced Prostate Cancer at age 44 (I am 48 now)
pT3b,N0,Mx (original PSA was 19.8) EPE, PM, SVI. Gleason 4+3=7
Da Vinci Surgery ~ 2/16/2007
Adjuvant Radiation Therapy ~ IMRT Completed 8/07
Adjuvant Hormone Therapy ~ 28 months on Casodex and Lupron.