Home » Neuroendocrine tumors (NETs) constitute what percentage of lung cancers Cancer MCQs Neuroendocrine tumors (NETs) constitute what percentage of lung cancers January 11, 2022 6 Views Q. Neuroendocrine tumors (NETs) constitute what percentage of lung cancers A. 10 B. 20 C. 30 D. 40 Answer: 20%