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Test Code
CAB2T
Test Name
Beta-2 Transferrin, Fluid
CPT Codes
86335
Expected Turnaround Time
3 - 7 days
Clinical Utility
Aids in the diagnosis of CSF leak.
Specimen and Container Info

Specimen Type: Aural Fluid

Alternate Specimen Type: Nasal Fluid

Collection Container: Sterile, Non-Additive Container

Desired Specimen Volume: 2 mL
Collection Instructions
  1. Collect fluid in a sterile, non-additive container.
  2. If direct collection is not feasible, specimen may be collected using a plain cotton swab or gauze and submitted in a sterile container. Do not add any liquid to the swab or gauze.
Processing and Submission Instructions
  1.  Transport 2 mL of fluid in the original collection container.
Transport Instructions

Transport to the laboratory frozen.
Stability Requirements

Room Temperature

14 days

Refrigerated

14 days

Frozen

14 days
Causes for Rejection
  • Specimens grossly contaminated with blood
  • Specimens collected with additives (e.g., microbiology media, EDTA, etc.)
  • CSF fluid.
Methodology
Qualitative Immunofixation Electrophoresis
Reference Intervals

See patient report.
Alternate Names
  • CSF-Specific Transferrin
  • Desialated Transferrin
  • Cerebrospinal Fluid Leakage
  • Transferrin, Spinal Fluid
  • Tau CSF Protein
  • Transferrin B2
  • B2 Transferrin
  • CSF Leakage Detection
  • CSF Specific Transferrin
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Routine, daily
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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