Being told you have cancer of unknown primary (CUP) can be scary, and you may have many questions. But you have people on your healthcare team to help.
If your healthcare provider thinks you might have cancer of unknown primary (CUP), you will need certain exams and tests to be sure. These tests will be used to try to find the place the cancer started.
Most cancers are staged with the Roman numerals I, II, III, and IV. The stage of cancer of the unknown primary is at least a stage II.