Alpha-subunit, free

Alphabetical Test listing

Alpha-subunit, free-994

Test name:

Alpha-subunit, free

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Alternate names:

Alpha subunit, free
Pituitary glycoproteins, alpha subunit

Useful for:

The alpha subunit is a common protein structure to LH, FSH, TSH and hCG. These hormones are comprised of identical alpha subunits and unique beta subunits that confer biological specificity. Alpha subunit test is useful in the diagnosis and management of various pituitary, placental, pancreatic and hCG-producing tumors.

Specimen type:

Serum

Collection container:

Gold serum separator (SST) tube

Volume:

1.0 mL

Minimum volume:

0.25 mL
Submission of the minimum volume does not allow for repeat testing

Collection instructions:

Immediatley following collection, mix sample by gently inverting 5 times

Processing instructions:

Allow specimen to clot for a minimum of 30 minutes
Spin
Transfer serum to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp)
Freeze

Transport container:

Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp)

Alternate collection container:

Red serum vial/tube, 5 mL

Alternate processing instructions:

Allow sample to clot
Spin
Transfer serum to a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp)
Freeze

Transport and stability:

Frozen (preferred) - 200 days

Refrigerated - 1 day

Ambient - 1 day

Performing lab:

Esoterix Endocrinology via LabCorp (140269): R-NX

Days set up:

TAT:

6 - 10 days

Method:

Immunocheminliminometric assay (ICMA)

Reference ranges:

Age and gender dependent - see report

CPT codes:

83520

LOINC code:

Result: 140271 Alpha Subunit (Free) 30316-4

Date created:

06/04/2019

Revised date:

12/07/2023

Review date:

12/07/2023