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Karyotype, GTG-banding -Tissue

Alternate test name

Chromosome analysis


Gene name / Alternate gene name
  • All chromosomes
Lab area
Genome Diagnostics - Cytogenetics
Method and equipment
Cell culture; G-banding
Expected turn-around time
4 weeks
Specimen type


Specimen requirements

Minimum 2-3 mm3 fresh tissue (skin biopsy)

Storage and transportation

Refrigerate until time of shipment. Ship sample overnight at room temperature for receipt at SickKids Cytogenetics Laboratory within 24 hours of collection.

Special requirements

Place in sterile container with SickKids Cytogenetics transport media or other sterile culture media.

Shipping information
The Hospital for Sick Children
Division of Genome Diagnostics
555 University Avenue, Black Wing, Room 3416
Toronto, ON
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:
Email Cytogenetics:
Background and clinical significance

Karyotyping of fibroblasts derived from tissue biopsy is usually performed when mosaicism is suspected in a patient, or when results cannot be obtained from peripheral blood.

Disease condition

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

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