Days Set Up
Monday - Thursday
Analytic Time

3 - 10 days

MiChart Code
ROS1 (6q22) Rearrangement by FISH
Soft Order Code
MROS1

Test Updated:

Synonyms

Crizotinib evaluation for Non-small cell lung cancer (NSCLC)
MROS1

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Test Overview

Test Methodology

Fluorescence In Situ Hybridization (FISH)

Test Usage

This test detects rearrangements involving the ROS1 gene region (6q22) via fluorescence in situ hybridization (FISH) in formalin-fixed, paraffin-embedded tissue specimens. FISH is performed using break-apart probes (Abbott Molecular) to qualitatively assess for the presence of ROS1 translocations that occur in non-small cell lung cancer. Patients with locally advanced or metastatic non-small cell lung cancer (NSCLC) that is positive for ROS1 rearrangement may respond to crizotinib therapy.

Reference Range

Interpretive report provided.

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

Specimen Requirements

Collection Offsite

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
Minimum Volume
 

Billing Information

CPT Code
88377-TC
Pro Fee Code
 
LOINC
 

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.