RATIONALE: Collecting and storing samples of tissue from patients with cancer to test in the laboratory may help the study of cancer in the future.
PURPOSE: This research study is collecting tissue samples from patients with cancer undergoing radiation therapy. Healthy participants will also be allowed on the trial so their samples can be used in comparison to patients with malignancy
Pathologically-proven diagnosis of malignancy
Planning treatment with radiation therapy
Able to perform follow-up visits
Is a patient of the University of Texas Southwestern Medical Center physicians
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