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Karyotype, GTG-banding - Blood
Alternate test name
Chromosome Analysis
G-banding
Gene name / Alternate gene name
- All chromosomes
Lab area
Genome Diagnostics - Cytogenetics
Method and equipment
3 day PHA-stimulated thymidine-synchronized culture; G-banding
Expected turn-around time
Routine - 4 weeks.
Newborns or expedite cases - 5-9 working days.
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
Requisition
Background and clinical significance
Cytogenetic disorders are present in nearly 1% of live births. Indications for chromosome analysis include aneuploidy syndromes, endocrine disorders, query mosaicism, multiple miscarriages, and infertility.
Disease condition
Constitutional chromosome disorders, including aneuploidy, chromosome rearrangements, and mosaicism
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