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Trisomy 21 FISH, Rule Out Mosaic (Buccal)

Test Information

Trisomy 21 FISH, Rule Out Mosaic is a cytogenetic test designed to detect varying degrees of mosaicism for chromosome 21 aneuploidy.

Turnaround Time

28 days

CPT Code(s)

88275 x2, 88271 x2, 88291

Cost

$758

Disorders

Trisomy 21 also Down syndrome

Methodology

FISH: Fluorescence in situ hybridization is a molecular cytogenetic technique in which fluorescently labeled DNA probes are hybridized to metaphase spreads or interphase nuclei.

Specimen Requirements

FISH analysis on buccal samples requires a kit provided by the Greenwood Genetic Center. Buccal cells are collected by brush and smeared onto a microscope slide using included instructions. Saliva is not accepted for this test.

Transport Instructions

Return the labeled slides in the provided packaging via USPS or other transport service at room temperature.

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Have Questions? Need Support?

Call our laboratory at 1-800-473-9411 or contact one of our Laboratory Genetic Counselors for assistance.
Robin Fletcher, MS, CGC
Falecia Thomas, MS, CGC
Alex Finley, MS, CGC