High conformal RT doses improve PSA, increase toxicity

Orlando, FL-Conformal radiotherapy to the prostate with isocenterdoses of 78 Gy lowers biochemical failure by at least 6% at 6 years, andby as much as 19% for men at higher risk of cancer relapse. But the costis a 14% increase in mild to moderate risk of rectal toxicity, accordingto two reports presented at the American Society of Clinical Oncology annualmeeting.