Comparative Genomic Hybridization (CGH) with Single Nucleotide Polymorphism (SNP Array) with Limited G-Bands

Sunquest Code:CGSNPLCoPath Code:CGSNPL
Epic Code:LAB6601  
Sunquest Code (non-Epic sites):CGSNPL  
Synonyms:CGH with SNP with G-Band; Microarray with SNP
Methodology:Chromosomal microarray (CMA) with limited chromosome analysis by G-banding
Turnaround Time:Results are reported within 7-21 days.
Special Instructions:Test request form requires:
  • Date and time of specimen collection
  • Specimen type
  • Patient information: date of birth, sex and medical record number
  • Orderin physician and contact number
  • Reason for referral
  • Clinical status
  • Information regarding medications or transfusions
  • Previous or pending genetic testing results

A signed informed consent in the patient's medical record is required. The consent should not be sent to the laboratory. The link to the Genetic Testing Consent Form is provided as a convenience for the providers and genetic counselors. See Associated Links.
Associated Links:

Genetic Testing Consent Form

Collection Instructions

Specimen:Whole blood or bone marrow
For whole blood: BOTH a green (sodium heparin, no gel) tube AND a purple (EDTA) tube or Yellow (ACD) tube must be collected.
Optimal Volume:Blood: 5 mL in green (sodium heparin, no gel) AND 5 mL purple (EDTA) or yellow (ACD) tube.
Bone Marrow: 5 mL aspirate in a dry heparin syringe.
Minimum\Peds Volume:Blood: 3 mL in green (sodium heparin, no gel) AND 3 mL purple (EDTA) or yellow (ACD) tube. Both tubes requred for testing. 1-3 mL for each tube will be accepted for patients with blood draw limitations.
Bone Marrow: 3 mL aspirate in a dry heparin syringe.
Container:Green (sodium heparin, no gel) AND Purple (EDTA) (Dry heparin syringe, Yellow (ACD, Solution A) tube available from laboratory)
Collection Instructions:Collect BOTH 5-10 mL in sodium heparin (green) AND 5-10 mL in purple (EDTA) or yellow (ACD). The yellow ACD is an alternate to the EDTA tube only.
Collect only bone marrow in a dry heparin syringe.
Causes for Rejection:Clotted or frozen sample.

Processing and Shipping

Specimen Processing:Do not process. Store at room temperature. Do not refrigerate or freeze.
Specimens must be received in the Cytogenetics Laboratory Mon-Fri by 5:30 pm; weekends or holidays by 4:30 pm. Specimens received after these cutoffs will be processed the following day.
Shipping Instructions:Ship at room temperature. For optimal testing rsults the specimen must arrive within 24 hours of collection.
Test Performed at or Referral Lab Cytogenetics  (UMMC-East Bank)


Reference Range:By report.

Click HERE to Report test errors or omissions.
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