The reason I mentioned IMPT is that it was (I believe) designed to treat difficult to reach tumors, like brain, lung, etc. The articles I read (years ago) said that IMPT reaches the tumor without any damage to cells going in or out and when it reaches the pre computer designed tumor coordinates it enters it and conforms to the tumor and like a smart bomb, destroys just the tumor. So when you mentioned your "highly promblematic" tumor I thought that IMPT might be able to reach it and destroy it safely.
David
Age 58 at Dx, HPV16+ SCC, Stage IV BOT+2 nodes, non smoker, casual drinker, exercise nut, Cisplatin x 3 & concurrent IMRT x 35,(70 Gy), no surgery, no Peg, Tx at Moffitt over Aug 06. Jun 07, back to riding my bike 100 miles a wk. Now doing 12 Spin classes and 60 outdoor miles per wk. Nov 13 completed Hilly Century ride for Cancer, 104 miles, 1st Place in my age group. Apr 2014 & 15, Spun for 9 straight hrs to raise $$ for YMCA's Livestrong Program. Certified Spin Instructor Jun 2014.