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FISH for Chromosome 21

Omics test Model
Test Code FPC006
Test Summary Fluorescence in situ hybridization (FISH) is performed for aneuploidy detection of chromosome 21
Turn Around Time 3 days
Acceptable Sample Types Products of Conception
NY Approved No
Accreditations CAP , ISO 15189 (NABL)
*TAT starts after the sample and all required sample information is received at the processing laboratory.

**The CPT codes listed are in accordance with Current Procedural Terminology, a publication of the American Medical Association, and are provided for informational purposes only. CPT coding is the sole responsibility of the billing party.

This testing service has not been cleared or approved by the U.S. Food and Drug Administration. Testing services may not be licensed in accordance with the laws in all countries. The availability of specific test offerings is dependent upon laboratory location.
This test is not available in your region United States, please select your nearest laboratory to request more information.
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Test Code: FPC006
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Test Description

FISH - Rapid detection of aneuploidy involving chromosome 21. Assay offered in conjunction with chromosome study.

Indications for Testing

FISH - The FISH analysis does not detect structural chromosome abnormalities, mosaicism, and other numerical chromosome abnormalities (excluding 13, 18, and 21). The American College of Medical Genetics recommends that irreversible therapeutic action should not be initiated on the basis of FISH results alone.

Condition Description

FISH

  • Screening result suggests aneuploidy
  • Advanced maternal age
  • One major or at least two minor fetal structural defects found on ultrasound
  • Previous fetus or child with aneuploidy
  • Parent of this pregnancy has a structural chromosome abnormality (e.g.,translocation, inversion) involving chromosome 21

Test Methods and Limitations

FISH - Fluorescence in situ hybridization (FISH) Fluorescence Microscopy

Detailed Sample Requirements

Products of Conception
Test Details Page
Collection Container(s) Sterile, screw-top container filled with tissue culture transport medium.
Collection

All prenatal specimens will be tested for maternal cell contamination (MCC). Send maternal blood (EDTA tube) for comparison. Transport products of conception and/or fresh tissue (minimum: 10 mg) in a sterile, screw-top container filled with tissue transport medium. Do not place in formalin. If the specimen is too large for a normal collection tube, a larger sterile container can be used.
Sample Condition If the autopsy is performed: Facia lata, diaphragm, tendon, skin, tissue from internal organs (if fresh), chest wall cartilage (particularly if macerated), or placenta from fetal side. If no autopsy is performed: Placenta from fetal side is preferred, e.g., villi. Umbilical cord is also acceptable. State clearly in the TRF whether the tissue was of fetal or placental in origin.
Shipping Shipped immediately at ambient temperature or with a cold pack, especially under hot weather to the laboratory by overnight express with arrival Monday-Friday only. Alternatively, fresh POC and/or tissue samples can be snap-frozen and kept at -80°C. Frozen tissue samples should be shipped overnight on dry ice with arrival Monday-Friday only - NO WEEKEND SHIPMENTS!
Special Sample Instructions For prenatal samples, Revvity Omics will provide a shipping label to use for shipping the sample to our lab. Please call 1 (866) 354-2910 to arrange this. At this time, you will also be connected to a laboratory genetic counselor to answer any questions about the testing. For samples originating outside of the United States, please contact your nearest Revvity Omics laboratory for more information.