Constitutional Chromosomal Microarray (Copy Number) with Limited G-band Analysis
Abbrev Code: | CGLCG | ||
Order Code: | LAB5988 | Order Name: | Constitutional Chromosomal Microarray (Copy Number) with Limited G-band Analysis |
Synonyms: | CGH LTDHR; CGH with Limited Blood High Resolution Chromosomes; CGH w/Ltd blood high res; Microarray; High Resolution G-Bands; CGH, Chromosomes; Chromosomal Microarray (CMA), Congenital, Constitutional | ||
Methodology: | Copy number chromosomal microarray (CMA) with limited chromosome analysis by G-banding. Congenital. | ||
CPT Codes: | 81228 x1, 88230 x1, 88261 x1, G0452 x1, x1 | ||
Turnaround Time: | Results should be reported within 7-21 days. | ||
Special Instructions: |
Test request form requires:
A signed informed consent in the patient's medical record is required. The consent should not be sent to the laboratory.A link to the Genetic Testing Consent Form is provided as a convenience for the providers and genetic counselors. See Associated Links. |
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Associated Links: |
Collection Instructions
Specimen: | Whole Blood.
Alternative: Cord 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 green (sodium heparin, no gel) AND 5 mL purple (EDTA) or yellow (ACD). Both tubes required for testing. |
Minimum\Peds Volume: | 3 mL in green (sodium heparin, no gel) AND 3 mL purple (EDTA) or yellow (ACD). Both tubes required for testing.
1-3 mL for each tube will be accepted for patients with blood draw limitations. No heel sticks or finger sticks accepted. |
Container: | Green (sodium heparin, no gel) AND Purple (EDTA) Alternate Containers: Yellow (ACD, Solution A) tube available from laboratory |
Collection Instructions: |
Collect BOTH 3-10 mL in green (sodium heparin, no gel) AND 3-5 mL in purple (EDTA) or yellow (ACD). The yellow (ACD) is an alternate tube to the EDTA tube only.
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Causes for Rejection: | Clotted or frozen sample; Incorrect specimen collection tube (anticoagulant). |
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) |
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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