Test Description
FISH - Rapid detection of chromosome 22q microdeletion and the 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 X, Y, 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
22q deletion syndrome — is a disorder caused when a small part of chromosome 22 is missing.
Test Methods and Limitations
FISH - Fluorescence in situ hybridization (FISH) Fluorescence Microscopy
Detailed Sample Requirements
Whole Blood (EDTA)
Test Details Page
Collection Container(s)
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EDTA (purple top) |
Collection
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Infants (< 2-years): 2 to 3 mL; Children (>2-years): 3 to 5 mL; Older children and adults: Minimum 5mL. The blood tube should be inverted several times immediately after blood collection to prevent coagulation. |
Sample Condition
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Store at ambient temperature. Do not refrigerate or freeze. |
Shipping
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Ship overnight at ambient temperature ensuring receipt within 5-days of collection. |
Special Sample Instructions
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Clotted or hemolyzed samples are not accepted. |