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Paediatric Laboratory Medicine

G-Band Karyotyping - Constitutional, Peripheral Blood

Clinical Significance

Cytogenetic disorders are present in nearly 1% of live births. Indications for chromosome analysis include

Test Name

G-Band Karyotyping - Constitutional, Peripheral Blood

Alternate Name/ Synonym

Chromosome analysis

Gene Name

  • All chromosomes

Division

Cytogenetics

Method

3 day PHA-stimulated thymidine-synchronized culture; G-banding

External Proficiency Testing

CAP
QMPLS

Turn Around Time

4 weeks for routine
5-9 working days for expedite

Disease/Condition

Constitutional chromosome disorders, including aneuploidy, chromosome rearrangements, and mosaicism

Specimen Type

Peripheral blood

Minimum 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/Transportation

Maintain at room temperature. Do not refrigerate or freeze.

Special Requirements

Collect in sodium heparin tube.

Shipping and Contact Information

The Hospital for Sick Children
Rapid Response Laboratory
170 Elizabeth Street, Room 3642
Toronto, ON
M5G 2G3
Canada
Phone: 416-813-7200
Phone: 1-855-381-3212

Interpretation

Provided