If this is after looking at all the areas from which the cell could have orginated without success along with qualified second opinions, it is possible the prognosis is better than many known primaries. However, cancer cannot be efficiently and simply treated with maximum agressiveness without knowing the specific primary. Therefore, every reasonable effort should be made to locate the primary. D.C. Operated by the U.S. government, their services are completely free. If no treatment has been received within 30 days of diagnosis, it can indicate you are not recognizing the critical nature of cancer and the fact that it is probably never as treatable as it is right now.
Most cancers are treatable at the time they are discovered.
If they go untreated properly, at some time in the future whether tomorrow, next month or next year they will be untreatable. If you've let it go 60 days, obviously the situation is more serious. If you have a malignancy and no treatment is being given or recommended, you are a masochist and intentionally are waiting for it to get worse, or you have not exhausted all your options and are waiting to die. As a California oncologist told me, there are always options for treatments. As long as he had been practicing, he had never seen a patient run out of possibilities for treatment as long as they were alive.