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Diagnostic utility of a blood-based circulating neuroendocrine tumor gene assay—the 51 marker gene NETest—in bronchopulmonary NETs. Transcripts are elevated in 94% in both typical and atypical tumors. Chromogranin A (CgA) in contrast is only positive (elevated beyond normal levels) in 40%. Typical carcinoids are positive in (36%) and atypical tumors positive (46%).
