Test Overview
Test Methodology

Fluorescence In Situ Hybridization (FISH)

Test Usage

This test detects the IGH/BCL2 t(14;18)(q32;q21) translocation via fluorescence in situ hybridization (FISH) in formalin-fixed, paraffin-embedded tissue specimens. FISH is performed using a dual-color dual-fusion probe set (Abbott Molecular) to qualitatively assess for the presence of the IGH/BCL2 translocation that occurs in most follicular lymphomas (FL) and a subset of diffuse large B-cell lymphomas (DLBCL). Testing for the IGH/BCL2 translocation may aid in the diagnosis of these tumors.

Reference Range *

Interpretive report provided.

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

Test Limitations

This test will only detect the IGH/BCL2 translocation and will not detect rare variant BCL2 translocations. In addition, this test may fail to detect a translocation in a sample with a low neoplastic burden.

Test Details
Days Set Up
Monday - Thursday
Analytic Time

3-10 days

Soft Order Code
MiChart Code
IGH/BCL2 t(14;18) Translocation by FISH
  • BCL2DF
  • IHG/BCL2 t(14;18) by FISH
  • t(14;18) Translocation
Molecular Diagnostics
Molecular Diagnostics
Specimen Requirements
Collection Instructions

A formalin-fixed, paraffin-embedded tissue block containing sufficient neoplastic cells is preferred. Unstained slides (3, 4-micron slides) with associated H&E stained slide are also acceptable. Decalcified tissue or other fixatives will be accepted and the assay attempted, however these may result in failed testing due to degraded nucleic acid. Both blocks and slides should be stored at room temperature.

Normal Volume
Formalin-fixed, paraffin-embedded tissue
Additional Information

By ordering this test the clinician acknowledges that informed consent has been obtained from the patient as required by applicable state or federal laws and the ordering clinician has authorization from the patient permitting MLabs to report the test results to the ordering clinician. Test includes pathologist interpretation of results billed as a separate additional charge. This test is not available without interpretation.

CPT Code
Fee Code
Pro Fee CPT
NY State Approved