RecruitingClinical trialCollecting Tissue Samples From Patients With Cancer Undergoing Radiation Therapy and Healthy ParticipantsRATIONALE: 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