STEP 2 REGISTRATION SECOND REGISTRATION (STEP 2) STEP 0: REGISTRATION (Optional) Patients with a primary colon or rectal cancer resection who are potentially eligible for S0820 may be pre-registered at Step 0; patients registered to Step 0 will appear on an institutional patient tracking report; patients registered to Step 0 are not registered to the S0820 protocol; to participate in S0820, patients must be registered to Step 1 after patient is consented and evaluation of eligibility; patients registered to S0820 at Step 0 continuing to Step 1 registration must use the same Southwest Oncology Group (SWOG) patient identification (ID) for registration to S0820 Step 1 STEP 1: REGISTRATION STEP II: Step 2 registration must be within 6 weeks of completing step 1 therapy Registration Step 1 � Induction/Re-Induction: Registration Step 2 � Post-Remission Therapy: Registration Step 3 � Maintenance: Patients must have adequate marrow function as evidenced by ANC >= 750/mcl within 28 days prior to registration PRIOR TO STEP 1 REGISTRATION PRIOR TO STEP 2 REGISTRATION Documentation of steroid doses within 28 days prior to step 2 registration STEP 1 PRIOR TO STEP 1 REGISTRATION: PRIOR TO STEP 2 REGISTRATION: Within 2 weeks prior to screening step registration and within 4 weeks prior to treatment step registration: Leukocytes >= 3,000/mcL Within 2 weeks prior to screening step registration and within 4 weeks prior to treatment step registration: Absolute neutrophil count >= 1,500/mcL Within 2 weeks prior to screening step registration and within 4 weeks prior to treatment step registration: Platelets >= 100,000/mcL PRIOR TO STEP 1 REGISTRATION PRIOR TO STEP 2 REGISTRATION PRE-REGISTRATION (STEP 0) STEP 1 (REGISTRATION) STEP 2 (REGISTRATION) Prostatectomy performed greater than 365 days (1 year) prior to step 1 registration STEP 1 REGISTRATION STEP 2 REGISTRATION PRIOR TO STEP 1 REGISTRATION: PRIOR TO STEP 2 REGISTRATION: PRIOR TO STEP 1 REGISTRATION PRIOR TO STEP 2 REGISTRATION STEP 1 REGISTRATION PRIOR TO STEP 2 REGISTRATION Financial clearance for proton therapy treatment prior step 2 registration