Test Overview
Test Methodology

Fluorescence In Situ Hybridization (FISH)

Test Usage

This test detects aneuploidy of chromosomes 3, 7, and 17 via fluorescence in situ hybridization (FISH) in bile duct brushing and aspirate specimens. Detection of chromosomal gains is associated with malignancy. As an adjunct to conventional cytology this test may be useful in the assessment of pancreatobiliary strictures for malignancy.

Reference Range *

Interpretive report provided.

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

Test Details
Days Set Up
Monday - Thursday
Analytic Time

3 - 10 days

Soft Order Code
MiChart Code
Biliary Tract Malignancy by FISH
Molecular Diagnostics
Molecular Diagnostics
Specimen Requirements

Obtain bile duct brushing or aspirate. Place brush directly into a ThinPrep (Non-Gyn) or conical tube containing CytoLyt solution, swirl the brush vigorously in the solution, then snip into the container, or place aspirate specimen into CytoLyt container. Refrigerate.

Rejection Criteria
Please note that specimens submitted in ThinPrep (Gyn) vials containing PreservCyt are not acceptable.
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