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IMRT for Prostate Cancer
DECISION FOR TREATMENT VOLUME
Roach Formula: Seminal vesicle risk (%) = PSA + [(Gleason Grade – 6) x 10]
Seminal Vesicle Low risk group
Clinical stages T1b/c or T2a/b and with PSA + [(Gleason Grade – 6) x 10] <15
Seminal Vesicle Moderate/High risk group
Clinical stages T1b/c or T2a/b and with PSA + [(Gleason Grade – 6) x 10] >15
T2c or T3a
PATIENT RISK DEFINITION
Patients with
low risk disease
- T1-T2b, Gleason Grade ≤ 6, PSA ≤ 10
Patients with
intermediate risk disease
- T2c, Gleason Grade 7, PSA 10-20
Patients with
high risk disease
-T3a-T4 Gleason Grade ≥ 8, PSA ≥20