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Oncology SNP Microarray

Important Note

This test will be ordered by cytogenetics laboratory staff as part of the routine cytogenetics work-up of patients with newly diagnosed acute leukemia

Clinical System Name

Chromosomal SNP Microarray


Bone Marrow Array
CMA Array


Oncology SNP Array

Oncology Array
Single Nucleotide Polymorphism


This test is appropriate for individuals with newly diagnosed acute leukemia

Sample Requirements

Specimen: Whole blood, or bone marrow

Container(s): sodium heparin or Lavender/EDTA

Preferred Vol: 2-3 mL*

Minimum Vol: 0.5-2 mL*

*volume requirement depends on WBC count and can be variable.

Processing Instructions

Reject due to: do not reject, contact Cytogenetics 987-3961

Spin: N

Aliquot: N

Temp: RT

Storage location:  Days: Transport specimen, requistion, and labels to 10th floor Cytogenetics (station #180). 

Eves/Nights: Store specimen, copy of requisition, and labels in the Cytogenetics box in CPA.


Off-site collection:  Ship overnight at RT. Samples received Mon-Fri: 8:00 am - 5:00 pm.


Temperature Time
Room temp 5 days
Refrigerated 5 days
Frozen No



STAT Performed TAT
N Daily up to 21 days


Performing Laboratory

Seattle Children's Hospital


Department: Cytogenetics Laboratory

Phone number: 206-987-3961


Lab Client Services: 206-987-2617,


Lab Genetic Counselors:



CPT Codes




The Affymetrix Cytoscan DX array contains 1.9 million non-polymorphic markers and 750,000 SNP markers which gives the following coverage:


  • Covering >36,000 RefSeq genes with one/880 bases
  • Backbone (non-gene) coverage of one marker/1,700 bases
  • X-chromosome genes (one marker/486 bases)
  • Covering 12,000 OMIM genes (~one marker/659 bases)

Special Instructions

Pre-test counseling