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Fluorescence in situ Hybridization (FISH) - Blood
Alternate test name
Rapid FISH (Direct Harvest)
- Trisomy 21
- Trisomy 13
- Trisomy 18
- X/Y
- BMT monitor by XX/XY FISH
FISH (Cultured Cells)
- Wolf-Hirschhorn (4p16)
- Williams (7q11.23)
- Prader-Willi/Angelman (15q11.2)
- Smith-Magenis (17p11.2)
- Microdeletion 22q11.2
- X/SRY
- SHOX (Xp22.3/Yp11.3)
- Microarray Follow Up FISH
- Other
Lab area
Genome Diagnostics - Cytogenetics
Method and equipment
3 day PHA-stimulated thymidine-synchronized culture; FISH (Fluorescence in situ hybridization)
Uncultured blood, direct harvest; Rapid FISH (Fluorescence in situ hybridization)
Expected turn-around time
Routine: 4 Weeks
Newborn or expedite case: 5-9 working days
Routine Microarray Follow Up FISH : 8-10 weeks
Specimen type
Peripheral blood
Specimen requirements
Blood at room temperature in sodium heparin
Volume: 0-3 months 1-3 mL
3 months-12 years: 3-6 mL
12 years - adult: 6 mL
Storage and transportation
Maintain at room temperature. Do not refrigerate or freeze.
Special requirements
Collect in sodium heparin tube
Shipping information
The Hospital for Sick Children
Division of Genome Diagnostics
555 University Avenue, Black Wing, Room 3416
Toronto, ON
Canada
M5G 1X8
Phone: 416-813-7200 ext. 2
Hours: Monday to Friday, 8 a.m. to 4:30 p.m.
Off hours: Please send to Rapid Response Laboratory, 555 University Avenue, Room 3642
Email Molecular Lab: molecular.lab@sickkids.ca
Email Cytogenetics: cytogenetics.requests@sickkids.ca
Background and clinical significance
Disease condition
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Customer Service
Toll Free: 1-855-381-3212
Local: 416-813-7200