Additional Study Information: We are doing this study to see if we can use a blood test to find mutations that are present in your cancer. You are being asked to participate in this study because you have been diagnosed with cancer and will be receiving treatment. To be eligible for this study, you must have a recent tumor sample available or be scheduled for a tumor biopsy in the near future. Many cancers have changes in their genes called mutations. Knowing what these changes are may allow us to pick treatments that are more likely to work. Currently, we need to use a piece of tumor to test for these mutations. We are developing a new test that can find these mutations using a blood test. Should this test work, we could avoid the need for tumor biopsies.