What is a neuroendocrine carcinoma cancer?

Interesting cancer: This is a type of cancer that mostly arises either from the small intestine, pancreas, or lung. They are unusual because some can produce certain hormones which cause symptoms like weight gain or weight loss, or diabetes, or diarrhea depending on which hormone is produced. If caught early, many are curable with surgical removal. The abbreviation is "NET" and another name is a carcinoid tumor.