Fluorescence In Situ Hybridization (FISH)
This test detects aneuploidy for chromosomes 3, 7, 17, and loss of the 9p21 locus via fluorescence in situ hybridization (FISH) in formalin-fixed, paraffin-embedded specimens including resections, biopsies and cytology cell blocks. Positive results are consistent with a diagnosis of malignant mesothelioma; however, a positive result by this test is not specific for mesothelioma. Metastatic carcinoma may also demonstrate a positive result.
Interpretive report provided.
A negative result may be obtained in patients with malignant mesothelioma if insufficient malignant cells are present within the sample. This result also does not rule out the presence of malignant mesothelioma that lacks the chromosomal abnormalities evaluated by this test.
3 - 10 days
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.
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.