CancersNeoplasmNeoplasm by Special CategoryMalignant NeoplasmSecondary Malignant NeoplasmMalignant Neoplasm of Unknown PrimaryCarcinoma of Unknown PrimaryHead and Neck Carcinoma of Unknown PrimarySubtypeHead and Neck Carcinoma of Unknown PrimaryCI-CAN-00002805Explore in graph →10 active trialsNCItC162595 OverviewStatisticsSurvivalGenomicsVariants & evidenceDrugsTrials16ResearchRankingsSources & provenance