Metastasizing neuroendocrine tumor of unknown origin found in cervical lymph nodes: a case report

Neuroendocrine tumors are a diverse category of tumors that have been known to produce biologically active amines and ectopic hormones of various types. Numerous metastasizing primary lesions have been identified, however, the head and neck region is not a common site for them. Even less common than these are head and neck metastatic sites without an identifiable primary lesion. We report a case of a metastatic neuroendocrine tumor, where the primary site eluded detection despite an extensive battery of investigations.