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HelpTest Code BALLM B-Cell Lymphoblastic Leukemia Monitoring, Minimal Residual Disease Detection, Flow Cytometry, Varies
Reporting Name
B-ALL Monitoring, MRD Detection, VPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Aids in monitoring a previously confirmed diagnosis of B-cell acute lymphoblastic leukemia
Method Name
Immunophenotyping
Additional Testing Requirements
If cytogenetic tests are also desired an additional specimen should be submitted. It is important that the specimen be obtained, processed, and transported according to instructions for the other required test.
Shipping Instructions
Specimens must be received within 3 days of collection.
Necessary Information
A copy of the diagnostic flow cytometry report is required.
Specimen Required
Submit only 1 of the following specimens:
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Specimen Type: Whole blood
Container/Tube:
Preferred: Yellow top (ACD solution A or B)
Acceptable: Lavender top (EDTA), green top (sodium heparin)
Specimen Volume: 6 mL
Slides: If possible, include 5 to 10 unstained blood smears labeled with 2 unique identifiers
Collection Instructions:
1. Send whole blood specimen in original tube. Do not aliquot.
2. Label specimen as blood.
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Specimen Type: Bone marrow
Container/Tube:
Preferred: Yellow top (ACD solution A or B)
Acceptable: Lavender top (EDTA), green top (sodium heparin)
Specimen Volume: 6 mL
Slides: If possible, include 5 to 10 unstained bone marrow aspirate smears labeled with 2 unique identifiers
Collection Instructions:
1. Submission of bilateral specimens is not required.
2. Send bone marrow specimen in original tube. Do not aliquot.
3. Label specimen as bone marrow.
Specimen Type
VariesSpecimen Minimum Volume
Blood: 2 mL
Bone Marrow: 1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Varies | Ambient | 72 hours |
Reject Due To
| Gross hemolysis | Reject |
Reference Values
An interpretive report will be provided.
This test will be processed as a laboratory consultation. An interpretation of the immunophenotypic findings and correlation with the morphologic features will be provided by a hematopathologist for every case.
Interpretation
An interpretive report for the presence or absence of B-cell acute lymphoblastic leukemia (B-ALL) minimal residual disease (MRD) is provided. Patients who have detectable MRD by this assay are considered to have residual/recurrent B-ALL.
Day(s) Performed
Preanalytical processing: Monday through Saturday
Results reported: Monday through Friday
Report Available
1 to 4 daysTest Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
88184-Flow cytometry; first cell surface, cytoplasmic or nuclear marker
88185 x 9-Flow cytometry; additional cell surface, cytoplasmic or nuclear marker (each)
88188-Flow Cytometry Interpretation, 9 to 15 Markers
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| BALLM | B-ALL Monitoring, MRD Detection, V | 102084-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| CK173 | BALLM Result | No LOINC Needed |
| CK174 | Final Diagnosis | 22637-3 |
| CK175 | Special Studies | 30954-2 |
| CK176 | Microscopic Description | 22635-7 |
Forms
If not ordering electronically, complete, print, and send a Hematopathology/Cytogenetics Test Request (T726) with the specimen.
Testing Algorithm
For more information see Acute Leukemias of Ambiguous Lineage Testing Algorithm