1 - 3 days
Chromogranin A, Serum
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Homogeneous Time-Resolved Fluorescence
Follow-up or surveillance or to aid in the diagnosis of carcinoid tumors. To aid in the diagnosis of other neuroendocrine tumors, including pheochromocytomas, medullary thyroid carcinomas (MTC), functioning and nonfunctioning islet cell and gastrointestinal amine precursor uptake and decarboxylation (APUD) tumors, and pituitary adenomas.
< 93 ng/mL
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Proton pump inhibitor drugs should be discontinued for at least 2 weeks prior to specimen collection. Collect specimen in a red top or SST tube. Centrifuge, aliquot serum into a plastic vial and freeze.