Comparative Genomic Hybridization (CGH) with Single Nucleotide Polymorphism (SNP Array)

Sunquest Code:CGHSNPCoPath Code:CGHSNP
Epic Code:LAB6575Epic Name:CGH with Single Nucleotide Polymorphism with Professional Interpretation
Sunquest Code (non-Epic sites):CGHSNP  
Synonyms:Single Nucleotide Polymorphism; CGH with SNP; Microarray with SNP
Methodology:Chromosomal microarray
Turnaround Time:Resultsare reported wtihin 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:Blood or Bone marrow
For blood: BOTH a green (sodium heparin, no gel) tube AND a purple (EDTA) 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). Both tubes required for testing.
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). 1-3 mL for each tube is acceptable 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 3-5 mL in green (sodium heparin, no gel) tube AND 3-5 mL in purple (EDTA) or yellow (ACD) tube. The yellow (ACD) is an alternate tube 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 and 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 results 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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