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Comparative Genomic Hybridization - Recommended


Sunquest Code:CGHCGCoPath Code:CGH
Epic Code:LAB4737Epic Name:CGH Comparative Genomic Hybridization
Sunquest Code (non-Epic sites):CYHOLD  
Synonyms:CGH; Microarray
Methodology:Microassay
CPT Code:81228 (CGH limited), 81228 (CGH 2), 81228 (CGH), 88230 (culture), G0452 (interpretation)
Turnaround Time:Processed daily. Results are reported within 14-28 days.


Collection Instructions

Specimen:Blood
Optimal Volume:10 mL in Na heparin (green) AND 10 mL purple (EDTA) or yellow (ACD).
Minimum Volume:5 mL in Na heparin (green) AND 5 mL purple (EDTA) or yellow (ACD). Infants and children: 1-3 mL in Na heparin (green) AND 1-3 mL purple (EDTA) or yellow (ACD, Solution A)
Container:Green (sodium heparin, no gel); Purple (EDTA). Alternate: Yellow (ACD, Solution A) tube available from laboratory.
Collection Instructions:Collect Green (sodium heparin, no gel) AND Purple (EDTA) tubes. Alternative to EDTA, collect yellow (ACD, Solution A).
Causes for Rejection:Clotted or frozen sample.


Processing and Shipping

Specimen Processing:Do not process. Store at room temperature. Do not refrigerate or freeze.
Shipping Instructions:Ship at room temperature.
Test Performed at or Referral Lab Cytogenetics  (UMMC-East Bank)


Interpretive

Limitations:Post-natal studies only.
Use:For detection of small duplications and deletions in patients with normal G-banded karyotypes. For characterization of abnormalities detected by G-banding.


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