pancreatic neuroendocrineneuroendocrine carcinoidneuroendocrine neoplasmneuroendocrine carcinomaneuroendocrine tumourmetastatic neuroendocrine carcinomaneuroendocrine carcinoid cancergastrointestinal neuroendocrine tumorsduodenal neuroendocrine tumormetastatic neuroendocrine cancermalignant neuroendocrine tumorneuroendocrine carcinoma cancer