Comparative Genomic Hybridization (CGH) for Parental Follow-Up


Sunquest Code:CGVOUSCoPath Code:CGVOUS
Epic Code:LAB6576Epic Name:CGH for Parental Follow-Up
Sunquest Code (non-Epic sites):CGVOUS  
Synonyms:Parental CGH; CGH for COUS; no charge CGH; Microarray
Methodology:Chromosomal microarray (CMA)
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
  • Ordering 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
BOTH a green (sodium heparin, no gel) tube AND a purple (EDTA) or yellow (ACD) tube must be collected.
Optimal Volume:5 mL in Na heparin (green) AND 5 mL in purple (EDTA) or yellow (ACD)
Minimum\Peds Volume:3 mL in Na heparin (green) AND 3 mL purple (EDTA) or yellow (ACD).  1-3 mL will be accepted for patients with blood draw limitations.
Container:Green (sodium heparin, no gel)
[Alternate Containers: Purple (EDTA), Yellow (ACD, Solution A) tube available from laboratory]
Collection Instructions:Collect green (sodium heparin, no gel) AND purple (EDTA) tubes. Alternative to purple (EDTA): collect yellow (ACD, Solution A) available from the laboratory. Both tubes are required for testing.
Causes for Rejection:Clotted or frozen sample. Incorrect specimen collection tube (anticoaguant).


Processing and Shipping

Specimen Processing:Do not process. Store at room temperature. Do not refrigerate or freeze.
Specimens must be received inthe 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.
Stability:For optimal testing results the specimen must arrive within 24 hours.
Test Performed at or Referral Lab Cytogenetics  (UMMC-East Bank)


Click HERE to Report test errors or omissions.
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