THSCM - Overview: Thyroid Function Cascade, Serum

Test Catalog

Test Name

Test ID: THSCM    
Thyroid Function Cascade, Serum

Useful For Suggests clinical disorders or settings where the test may be helpful

Screening for a diagnosis of thyroid disease

Profile Information A profile is a group of laboratory tests that are ordered and performed together under a single Mayo Test ID. Profile information lists the test performed, inclusive of the test fee, when a profile is ordered and includes reporting names and individual availability.

Test IDReporting NameAvailable SeparatelyAlways Performed
STSHCTSH, Sensitive, SYes, (order STSH)Yes

Reflex Tests Lists tests that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial tests

Test IDReporting NameAvailable SeparatelyAlways Performed
FRT4CT4 (Thyroxine), Free, SYes, (order FRT4)No
TPOCThyroperoxidase Ab, SYes, (order TPO)No
T3CT3 (Triiodothyronine), Total, SYes, (order T3)No

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

If thyroid-stimulating hormone (TSH) is <0.3 mIU/L, then free T4 (FT4) is performed at an additional charge.

If FT4 is normal and the TSH is <0.1 mIU/L, then T3 is performed at an additional charge.

If TSH is >4.2 mIU/L, then FT4 and thyroperoxidase antibodies are performed at an additional charge.


See Thyroid Function Ordering Algorithm in Special Instructions.

Special Instructions and Forms Library of PDFs including pertinent information and consent forms, specimen collection and preparation information, test algorithms, and other information pertinent to test

Method Name A short description of the method used to perform the test

Electrochemiluminescent Immunoassay

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name A shorter or abbreviated version of the Published Name for a test; an abbreviated test name

Thyroid Function Cascade, S