Oxaliplatin, Leucovorin Calcium, and Fluorouracil With or Without Bevacizumab in Treating Patients Who Have Undergone Surgery for Stage II Colon Cancer

Inclusion Criteria:

STEP 1: INITIAL REGISTRATION
The distal extent of the tumor must be >= 12 cm from the anal verge on endoscopy; if this distance was not confirmed on endoscopy pre-operatively, then the distal extent of the tumor must be >= 12 cm from the anal verge as determined by surgical examination; colonoscopy should be performed postoperatively for those unable to have a preoperative colonoscopy to guarantee there are no synchronous lesions; (if tumor is located beyond sigmoid colon and centimeter distance unavailable, include anatomic region of colon, e.g. right colon, transverse colon, hepatic flexure descending colon, cecum etc.)

Patients must have paraffin-embedded tumor specimen available for evaluation of microsatellite instability and loss of heterozygosity at 18q, to determine high risk versus low risk

High-risk patients will be randomized to treatment Arms A or B

Low-risk patients will be registered to Arm C for observation

NOTE: Every effort should be made to submit blocks (tumor and normal mucosa) to the Principal Coordinates Analysis (PCO) immediately; blocks CANNOT be accepted after day 50 (post surgery) in order to allow for molecular assessment
Specific laboratory requirements for Step 2 must be obtained within 2 weeks prior to Step 2 randomization
Patients must not have synchronous tumors
Patients must not have appendiceal tumors
Patients must not have a history of inflammatory bowel disease (IBD)
Patients with hereditary non-polyposis colorectal cancer (HNPCC) are eligible
Patients must have no history of isolated, distant, or non-contiguous intra-abdominal metastases, even if restricted

Patients must have histologically confirmed adenocarcinoma of the colon that meets the criteria below:

Stage II adenocarcinoma (pT3/pT4a/pT4b pN0 M0 according to the definitions of the American Joint Committee on Cancer, 7th Edition, 2010): the tumor invades through the muscularis propria into pericolic tissues (pT3), penetrates to the surface of the visceral peritoneum (pT4a), or directly invades other organs or structures (pT4b); patients with mesenteric tumor deposits or satellites without identifiable residual lymph node in the absence of lymph node involvement are now designated pN1c, rather than pT3; patients with such tumor deposits are not eligible for E5202; patients must have had a complete resection (R0 resection)
Patients must have >= 8 lymph nodes evaluated and reported
Patients must not have presented with clinical complete obstruction or perforation of the bowel
Patients must not have had any systemic or radiation therapy initiated for this malignancy

Patients must not have a previous or concurrent malignancy; exceptions are made for patients who meet any of the following conditions:

Non-melanoma skin cancer, in situ cervical cancer, or breast cancer in situ
Prior malignancy completely excised or removed and patient has been continuously disease free for > 5 years
Patients with completely excised or removed breast cancer and disease free > 5 years, regardless of the continuation of hormonal therapy
Patients with previous radiation therapy (RT) to the pelvic region will be ineligible
Patients must have Eastern Cooperative Oncology Group (ECOG) performance status of 0-2
STEP 2: RANDOMIZATION (HIGH RISK PATIENTS - ARMS A AND B ONLY)
Within 2 weeks prior to randomization, postoperative absolute granulocyte count (AGC) must be >= 1500/mm^3 (or < 1500/mm^3, if in the opinion of the investigator, this represents an ethnic or racial variation of normal)
Within 2 weeks prior to randomization, the postoperative platelet count must be >= 100,000/mm^3
Within 2 weeks prior to randomization, there must be postoperative evidence of adequate hepatic function; bilirubin must be =< upper limit of normal (ULN) unless the patient has a chronic grade 1 bilirubin elevation due to Gilbert's disease or similar syndrome due to slow conjugation of bilirubin
Within 2 weeks prior to randomization, there must be postoperative evidence of adequate hepatic function; alkaline phosphatase must be < 2.5 x ULN
Within 2 weeks prior to randomization, there must be postoperative evidence of adequate hepatic function; aspartate transaminase (AST) must be < 1.5 x ULN
Within 2 weeks prior to randomization, there must be postoperative evidence of adequate renal function; serum creatinine =< 1.5 x ULN
Within 2 weeks prior to randomization, there must be postoperative evidence of adequate renal function; urine protein/creatinine (UPC) ratio of < 1.0; patients with a UPC ratio >= 1.0 must undergo a 24-hour urine collection, which must be an adequate collection and must demonstrate < 1 gm of protein in order to participate
Patients with any significant bleeding that is not related to the primary colon tumor within 6 months prior to study entry are not eligible
Patients with gastroduodenal ulcer(s) determined to be active by endoscopy are not eligible
Patients with a history of hypertension must measure < 150/90 mmHg and be on a stable regimen of anti-hypertensive therapy
Patients must not have a serious or non-healing wound, skin ulcers or bone fracture
Patients experiencing clinically significant peripheral neuropathy at the time of step 2 randomization (defined in the National Cancer Institute [NCI] Common Terminology Criteria for Adverse Events version 4.0 [CTCAE 4.0] as grade 2 or greater neurosensory or neuromotor toxicity) are not eligible

Patients must not have had invasive procedures, defined as follows:

Major surgical procedure, open biopsy or significant traumatic injury within 28 days prior to randomization
Core biopsy or other minor procedure, excluding placement of a vascular access device, within 7 days prior to randomization
Or anticipate the need for major surgical procedure(s) during the course of the study
Patients must begin adjuvant treatment no less than 28 days and no more than 60 days from surgery
Eligible patients of reproductive potential (both sexes) must agree to use an accepted and effective method of contraceptive during study therapy and for at least 3 months after the completion of bevacizumab; women must not be pregnant or breast-feeding; all females of childbearing potential must have a serum pregnancy test to rule out pregnancy within 2 weeks prior to step 2 randomization

Patients with prothrombin time (PT) (international normalized ratio [INR]) > 1.5 are not eligible, unless the patient is on full-dose anticoagulants; if so, the following criteria must be met for enrollment:

The subject must have an in-range INR (usually between 2 and 3) on a stable dose of warfarin or on a stable dose of low molecular weight heparin
The subject must not have active bleeding or a pathological condition that is associated with a high risk of bleeding

Patients with non-malignant systemic disease (cardiovascular, renal, hepatic, etc.) that would preclude any of the study therapy drugs are not eligible; specifically excluded are the following conditions:

New York Heart Association (NYHA) class III or IV congestive heart failure
Current symptomatic arrhythmia
Any non-malignant systemic disease
Patients with a history of transient ischemic attack (TIA) or cerebrovascular accident (CVA) are not eligible

Patients with a history of the following within twelve months of study entry are not eligible:

Arterial thromboembolic events
Unstable angina
Myocardial infarction
Patients with symptomatic peripheral vascular disease are not eligible
Patients with psychiatric or addictive disorders or other conditions that, in the opinion of the investigator, would preclude them from meeting the study requirements are not eligible
Patients must not have a known allergy to platinum compounds
STEP 2: REGISTRATION (LOW-RISK PATIENTS - ARM C)
Patients determined to be low risk are eligible