Beta-2 Transferrin




Test Mnemonic

B2TRAN

CPT Codes

  • 86335 - QTY (1)

LOINC ®

13876-8

Aliases

  • CSF specific transferrin
  • Tau Protein

Includes

  • Beta-2 Transferrin

Performing Laboratory

ARUP


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
2 mLFluid, aural or nasalSterile container Frozen 

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mL     

Stability

Environmental Condition Description
Ambient2 weeks
Refrigerated2 weeks
Frozen2 weeks

Days Performed

Sun - Sat

Turnaround Time

2 - 5 days

Methodology

Name Description
Qualitative Immunofixation Electrophoresis 

Reference Range

Special Info

If direct collection is not feasible, specimen may be collected using a plain cotton swab or gauze and submitted in a sterile container (plain test tube, collection container, microtube, or syringe). Do not collect with a culture swab. Specimens collected with additives or grossly contaminated with blood will be rejected. This test is New York State approved.

Clinical Info

Detection of a beta-2 transferrin band by immunofixation is indicative of the presence of cerebrospinal fluid.

Clinical Limitation

Aural or nasal specimens may be contaminated with saliva, which can degrade transferrin protein. Specimens should be frozen immediately after collection.