we have found that neuroendocrine tumors ( including neuroblastoma , ganglioneuroma , gut carcinoid , pheochromocytoma , medullary thyroid carcinoma , insulinoma , glucagonoma , prolactinoma , carotid body tumor , and small cell lung carcinoma ) produce considerable amounts ( about 1000-80,000 ng/g tissue ) of the alpha subunit of guanine nucleotide-binding protein , go ( go alpha ) , whereas nonneuroendocrine tumors contain less than 300 ng of go alpha/g tissue .
C0206754
neuroendocrine tumors
C0027651
tumors