The purpose of this research study is to compare any good and bad effects of using the study drug, crizotinib (also known as XALKORI®), after completion of surgery and, in some cases, after chemotherapy and/or radiation therapy for ALK-positive non-small cell lung cancer. The addition of crizotinib may help prevent the patient's cancer from returning, but it could also cause side effects. This research study will allow the researchers to know whether this different approach is better, the same, or worse than the usual approach. To be better, the study drug should improve how long patients are able to live by 2 years and 9 months (33 months total) or more compared to the usual approach. The study drug, crizotinib, is already FDA-approved for use in ALK-positive locally advanced or metastatic (spread to other areas of the body) non-small lung cancer. The use of crizotinib in this study is investigational (not approved by the FDA) because crizotinib (or placebo) will be prescribed for earlier stage disease after the cancer has been surgically removed. A placebo is a capsule that looks like the study drug but contains no medication.
Patients taking low dose Methotrexate for non-malignant conditions and other cytotoxic agents for non-malignant conditions are allowed to continue treatment while on study.