neuroendocrine carcinoid cancercarcinoid tumor treatmentneuroendocrine carcinoid tumor lungneuroendocrine carcinoidgastrointestinal carcinoid tumorsendocrine carcinoid tumormetastatic carcinoid tumorcarcinoid tumor small intestineendobronchial carcinoid tumoratypical carcinoid tumorcarcinoid tumor pancreasmesenteric carcinoid tumor