The PIOTRON, 2

Seventeen patients (13 with bladder cancer Ta to T4, 2 with pancreas cancer, 1 each with biliary tract and renal cancer) have been treated with dynamc pion spot scan conformation techniques. Pion doses ranged from 1,900 to 3,600 rads in 7 to 20 fractions. In a follow-up period of 10 to 20 months 9 patients are alive, 1 with active local disease, 1 patient is well following salvage cystectomy, 1 patient has a severe late radiation cystitis, and 6 patients died of metastatic disease, none with local recurrence although microscopic disease was found in 4 of 5 autopsies. It is concluded that this technique is practical and continued dose and volume optimization for these and other sites continue. (author)