Test Code BARQ BCR::ABL1, Rare Fusion Monitoring, Quantitative, Varies
Ordering Guidance
This test should not be used to screen for BCR::ABL1 fusions at the time of diagnosis. For diagnostic evaluation, order BADX / BCR/ABL1, Qualitative, Diagnostic Assay, Varies; or BCRFX / BCR/ABL1 Qualitative Diagnostic Assay with Reflex to BCR/ABL1 p190 Quantitative Assay or p210 Quantitative Assay, Varies.
For measurable residual disease (MRD) monitoring of patients with chronic myeloid leukemia (CML) or, less commonly, B-cell acute lymphoblastic leukemia (B-ALL) or acute myeloid leukemia (AML) with a previously identified p210 (e13/e14-a2) fusion transcript, order BCRAB / BCR/ABL1, p210, mRNA Detection, Reverse Transcription-PCR (RT-PCR), Quantitative, Monitoring Chronic Myelogenous Leukemia (CML), Varies.
For MRD monitoring of B-ALL or rare CML or AML patients with a previously identified p190 (e1-a2) fusion transcript, order BA190 test / BCR/ABL1, p190, mRNA Detection, Reverse Transcription-PCR (RT-PCR), Quantitative, Monitoring Assay, Varies.
For more information, see BCR/ABL1 Ordering Guide for Blood and Bone Marrow
Shipping Instructions
Ambient specimens must arrive within 3 days (72 hours) of collection. Refrigerated specimens must arrive within 5 days of collection. Collect and package specimens as close to shipping time as possible.
Necessary Information
The following information is required:
1. Pertinent clinical history including if the patient has a diagnosis of chronic myeloid leukemia, B-cell acute lymphoblastic leukemia, or other BCR::ABL1-positive neoplasm
2. Specific fusion transcript if previously determined
3. Date of collection
4. Specimen source (blood or bone marrow)
Specimen Required
Submit only 1 of the following specimens:
Specimen Type: Whole blood
Container/Tube:
Preferred: Lavender top (EDTA)
Acceptable: Yellow top (ACD)
Specimen Volume: 10 mL
Collection Instructions:
1. Invert several times to mix blood.
2. Send whole blood specimen in original tube. Do not aliquot.
3. Label specimen as blood.
Specimen Type: Bone marrow
Container/Tube:
Preferred: Lavender top (EDTA)
Acceptable: Yellow top (ACD)
Specimen Volume: 4 mL
Collection Instructions:
1. Invert several times to mix bone marrow.
2. Send bone marrow specimen in original tube. Do not aliquot.
3. Label specimen as bone marrow.
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| BADX | BCR/ABL1, RNA-Qual, Diagnostic | Yes | No |
| BA190 | BCR/ABL1, p190, Quant, Monitor | Yes | No |
| BCRAB | BCR/ABL1, p210, Quant, Monitor | Yes | No |
Specimen Type
VariesSpecimen Minimum Volume
Whole blood: 8 mL; Bone marrow: 2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Varies | Refrigerated (preferred) | 5 days | PURPLE OR PINK TOP/EDTA |
| Ambient | 72 hours | PURPLE OR PINK TOP/EDTA |
Reject Due To
| Gross hemolysis | Reject |
| Moderately or severely clotted | Reject |
Reference Values
An interpretive report will be provided
Day(s) Performed
Weekly
Report Available
10 to 15 daysSpecimen Retention Time
Whole blood, Bone marrow: 2 weeks; Extracted RNA: 3 monthsPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
81208
BADX: 81206, 81207, 81208 (if appropriate)
BA190: 81207 (if appropriate)
BCRAB: 81206 (if appropriate)