What are the symptoms of neuroendocrine carcinoma?

Varied: Nfeouroendocrine tumors represent a large array of lesions representing small cell and larege cell tumors. Medullary ca of thyroid is a large cell neuroendocrine presenting as a neck mass. Small cell neuroendocrine of lung metastasizes to brain. Gi neuroendocrine tumors spread to liver ie carinoid, producing flusing and other hormone symptoms.