Test Overview

Test Methodology

Saponin permeabilization and direct immunofluorescence using flow cytometric techniques.

Test Usage

Terminal deoxynucleotidyl transferase (TdT) is a DNA polymerase which is recognized as a phenotypic markers for primitive T and B lymphocytes in the hematopoietic system. Measurement of TdT may be an adjunct to the diagnosis of some leukemias and lymphoblastic lymphomas.

Reference Range*

Pathologist interpretation of results provided.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details

Days Test Performed

Monday, Wednesday, Friday

Analytic Time

48 hours

Soft Order Code

FLABEL

Synonyms

Synonyms

FX FINAL
TdT Marker
Terminal Deoxynucleotidyl Transferase
FC CAN
PRELIM
FLOW ADD
FLOW TDT
FC CANCEL
FLOW CYTOMETRY ADDENDUM REPORT
FLOW FINAL
FLOW FINAL
FLOW PRELIMINARY
FLABEL
Generic Flow Test

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Laboratory

Flow Cytometry

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Specimen Requirements

Offsite Collection Instructions

The TdT test will be run at the discretion of the consulting hematopathologist after review of the slides, any available immunophenotypic analysis results, and/or other diagnostic evaluations, using the specimen received for Leukemia/Lymphoma Immunophenotyping.

Additional Information

Test includes pathologist interpretation of results billed as a separate additional charge. This test is not available without interpretation.

Billing Information

Fee Codes


CPT Code

88184, 88185, 88187

Pro Fee Code

88187.2

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