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HelpTest Code MDSMF Myelodysplastic Syndrome (MDS), Specified FISH, Varies
Ordering Guidance
This test is intended for instances when limited myelodysplastic syndrome (MDS) fluorescence in situ hybridization (FISH) probes are needed based on specific abnormalities or abnormalities identified in the diagnostic sample. The FISH probes to be analyzed must be specified on the ordering request. If targeted FISH probes are not included with this test order, test processing will be delayed and the test may be canceled and automatically reordered by the laboratory as MDSDF / Myelodysplastic Syndrome (MDS), Diagnostic FISH, Varies.
Chromosome analysis is recommended as first-tier testing; order either CHRBM / Chromosome Analysis, Hematologic Disorders, Bone Marrow, or CHRHB / Chromosome Analysis, Hematologic Disorders, Blood. This second-tier test should only be ordered if chromosome analysis is not successful, as it does not increase the sensitivity for detection of MDS for classic abnormalities (ie, -5/5q-, -7/7q-).
If a complete MDS FISH panel is preferred, order MDSDF / Myelodysplastic Syndrome (MDS), Diagnostic FISH, Varies.
Shipping Instructions
Advise Express Mail or equivalent if not on courier service.
Necessary Information
1. A reason for testing must be provided. If this information is not provided, an appropriate
indication for testing may be entered by Mayo Clinic Laboratories.
2. A flow cytometry and/or a bone marrow pathology report should be submitted with
each specimen. The laboratory will not reject testing if this information is not provided, but appropriate testing and interpretation may be compromised or delayed.
Specimen Required
Submit only 1 of the following specimens:
Preferred:
Specimen Type: Bone marrow
Container/Tube:
Preferred: Yellow top (ACD)
Acceptable: Green top (sodium heparin) or lavender top (EDTA)
Specimen Volume: 2 to 3 mL
Collection Instructions:
1. It is preferable to send the first aspirate from the bone marrow collection.
2. Invert several times to mix bone marrow.
3. Send bone marrow in original tube. Do not aliquot.
Acceptable:
Specimen Type: Whole blood
Container/Tube:
Preferred: Yellow top (ACD)
Acceptable: Green top (sodium heparin) or lavender top (EDTA)
Specimen Volume: 6 mL
Collection Instructions:
1. Invert several times to mix blood.
2. Send whole blood in original tube. Do not aliquot.
Useful For
Detecting recurrent common chromosome abnormalities associated with myelodysplastic syndromes (MDS) or other myeloid malignancies using client-specified probe set(s)
As an adjunct to conventional chromosome studies in patients with MDS
Evaluating specimens in which chromosome studies are unsuccessful
Identifying and tracking known chromosome abnormalities in patients with MDS and monitoring response to therapy
Testing Algorithm
This test includes a charge for the probe application, analysis, and professional interpretation of results for 1 probe set (2 individual fluorescence in situ hybridization [FISH] probes). Additional charges will be incurred for all reflex, if requested, or additional probe sets performed. Analysis charges will be incurred based on the number of cells analyzed per probe set. If no cells are available for analysis, no analysis charges will be incurred.
This test is performed using client-specified FISH probes and is not intended as a panel test. Specific probes must be listed in the probe request field. Reflex probes can be performed when appropriate if specified in the order request field.
When specified, any of the following probes will be performed:
inv(3) or t(3;3) or GATA2::MECOM fusion, request probe GATA2/MECOM
t(1;3)(p36;q21) or GATA2::PRDM16 fusion, request probe PRDM16/GATA2
t(3q26.2;var) or 3q26.2 rearrangement, request probe MECOM break-apart
-5/5q-, request probe D5S630/EGR1
-7/7q-, request probe D7Z1/D7S486
+8, request probe D8Z2/MYC
-17/17p-, request probe TP53/D17Z1
-20/20q-, request probe D20S108/20qter
Appropriate ancillary probes may be performed at consultant discretion to render comprehensive assessment. Any additional probes will have the results included within the final report and will be performed at an additional charge.
Method Name
Fluorescence In Situ Hybridization (FISH)
Reporting Name
MDS, Specified FISHSpecimen Type
VariesSpecimen Minimum Volume
Bone marrow: 1 mL; Whole blood: 2 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Varies | Ambient (preferred) | |
| Refrigerated | ||
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
An interpretive report will be provided.
Day(s) Performed
Monday through Friday
Report Available
7 to 10 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test 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
88271 x2, 88275 x1, 88291 x1- FISH Probe, Analysis, Interpretation; 1 probe set
88271 x2, 88275 x1 – FISH Probe, Analysis; each additional probe set (if appropriate)
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| MDSMF | MDS, Specified FISH | 62367-8 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 614289 | Result Summary | 50397-9 |
| 614290 | Interpretation | 69965-2 |
| 614291 | Result Table | 93356-4 |
| 614292 | Result | 62356-1 |
| GC124 | Reason for Referral | 42349-1 |
| GC125 | Probes Requested | 78040-3 |
| GC126 | Specimen | 31208-2 |
| 614293 | Source | 31208-2 |
| 614294 | Method | 85069-3 |
| 614295 | Additional Information | 48767-8 |
| 614296 | Disclaimer | 62364-5 |
| 614297 | Released By | 18771-6 |
Forms
If not ordering electronically, complete, print, and send an Hematopathology/Cytogenetics Test Request (T726) with the specimen.