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Alias Names:Alpha-PGH / Alpha-PCG / Human Chorionic Gonadotropin (hCG) / Soft-APGH / CG
Edit Date:8/18/2010
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.
Rejection Criteria:Specimen not frozen within 72 hours of collection; gross hemolysis; plasma.