Chromosome Analysis - Breakage, Ataxia Telangiectasia, Whole Blood
Ordering Recommendation
Useful for the diagnosis of ataxia telangiectasia. Not appropriate for carrier testing or for diagnosing Fanconi anemia or similar breakage syndromes.
Giemsa Band
12-17 days  
New York DOH Approval Status
Specimens from New York clients will be sent out to a New York DOH approved laboratory, if possible.
Time SensitiveTime Sensitive

Specimen Required
Patient Preparation
Specimens must be collected and shipped Monday-Wednesday only and not the day before a holiday. For Thursday and Friday shipping options please contact ARUP Referral Testing at (800)242-2787, extension 5145.  
Green (sodium heparin).  
Specimen Preparation
Transport 10 mL whole blood. (Min: 5 mL) Specimens must be received within 48 hours to ensure adequate culture of living cells.  
Storage/Transport Temperature
Room temperature.  
Unacceptable Conditions
Frozen specimens. Clotted specimens.  
Ambient: 48 hours; Refrigerated: Unacceptable; Frozen: Unacceptable  
Reference Interval
By report  
Interpretive Data
Chromosome breakage study performed by stimulating cells with phytohemagglutinin (PHA), and staining to identify the chromosome banding pattern. These studies involve culturing of living cells; therefore, turnaround times given represent average times and are subject to multiple variables. Hard copy reports are generated following completion of analysis. After specimen receipt, results are generally available in an average of four weeks.

This test must be ordered using a Cytogenetic Test Request Form (#43097) or through your ARUP interface. A processing fee will be charged if the client cancels this procedure after the test has been set up or if the specimen integrity is inadequate to allow culture growth. The fee will vary based on specimen type.
CPT Code(s)
88230; 88248
Component Test Code*Component Chart NameLOINC
2005750Chromosome Analysis, Breakage, AT, WB 
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Performed at Stanford UMC Cytogenetics Lab