Chromosome Analysis, Blood, Limited with Reflex to Chromosome Array (ACGH)

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CHROMOSOME ANALYSIS, BLOOD, LIMITED WITH REFLEX TO CHROMOSOME ARRAY (aCGH)

TURNAROUND TIME: 7 days

PRELIMINARY VERBAL REPORT: Available for the referring physician after 48 hours for newborns only
 
TESTING METHODOLOGY: Chromosome analysis of metaphase cells with reflex to aCGH if no abnormality is identified
 
SPECIMEN REQUIREMENTS:
  • Collect: 3-5 mL peripheral blood in sodium heparin (green) for children; 1-2 mL peripheral blood in sodium heparin (green) for newborns
  • Min. Collection: 1 mL for newborns; 2 mL for children
  • Transport: peripheral blood in sodium heparin (green) at 20-25oC
  • Stability: Ambient: 24 hours; Refrigerated: 72 hours; Frozen: unacceptable
  • Unacceptable Conditions: Frozen or clotted specimens; specimens in anticoagulants other than sodium heparin
A Cytogenetics Laboratory Test Requisition must accompany the specimen. Contact the Cytogenetics Laboratory at 918-502-1722 to obtain further information.
 
INTERPRETIVE DATA:
 
Related Tests: Chromosome array (aCGH)
 
Methods: Giemsa band (G-band) analysis at approximately 400 band level; 1 karyotype, analysis of 2 metaphase cells and count of 5 metaphase cells.
 
Test Variables: This study involves culturing of living cells. Therefore, turnaround times given represent average times which are subject to multiple variables.
 
Test Limitations: Small chromosome rearrangements and mosaicism are not detected.
 
Indications for Use:
  • Limited chromosome analysis for detection of constitutional chromosome abnormalities
  • Detection of aneuploidy (trisomies, monosomies) or large rearrangements only