What is a nonfunctional neuroendocrine tumor?

John A. Chabot
Endocrinology Diabetes & Metabolism

Nonfunctional neuroendocrine tumors represent about 40% of all tumors affecting the islet cells. These tumors are termed nonfunctional or clinically silent because they do not produce excessive hormones. They are slow growing and may be very large by the time of diagnosis. About half of these tumors are malignant.

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