Can you use NGS panels or ctDNA to help you find organ of origin in the workup of carcinoma of unknown origin?   

At least 2 NGS panels available in the US now offer tumor of origin (TO) profiling. Both Tempus and Caris offer such testing. There are other panels out there using different methods such as epigenetic profiling and WGS. How much this testing improves diagnosis and outcomes is not clear and 2 trials...