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| 80470:ALPHA-SUBUNIT OF PITUITARY GLYCOPROTEIN HORMONES, SERUM | |||||||||
| Alias Names: | Alpha-PGH / Alpha-PCG / Human Chorionic Gonadotropin (hCG) / Soft-APGH / CG | ||||||||
| Edit Date: | 8/18/2010 | ||||||||
| Performed: | Thursday | ||||||||
| Released: | 48 hours after setup at PeaceHealth Laboratories’ reference lab | ||||||||
| CPT Code: | 83520-90 | ||||||||
| Specimen Collection Details | |||||||||
| Collection: | One 7.5 mL serum separator tube (SST). | ||||||||
| Handling: | Allow to clot, centrifuge and separate serum into a plastic vial. Freeze. Refrigerated specimens are acceptable if they arrive at reference lab within 72 hours of collection. | ||||||||
| Standard Volume: | 1 mL serum | ||||||||
| Minimum Volume: | 0.5 mL serum | ||||||||
| Transport: | Frozen on dry ice. | ||||||||
| Comments: | Useful in the diagnosis of pituitary tumors, follow-up treatment of pituitary tumor patients, differential diagnosis of TSH-secreting pituitary tumor versus thyroid hormone resistance, or CDP versus HH.
The alpha-subunit of pituitary glycoprotein hormone assay has been called the alpha-human chorionic gonadotropin (hCG) assay. However, the assay measures the alpha-subunit of thyroid-stimulating hormone, in addition to that of hCG. Quantitating the alpha-subunit has been advocated as a monitoring test to detect the recurrence of tumors in patients who have undergone resection of pituitary adenomas. |
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| Rejection Criteria: | Specimen not frozen within 72 hours of collection; gross hemolysis; plasma. | ||||||||