Test Details
Methodology
Fluorescence in situ hybridization (FISH)
Result Turnaround Time
3 - 5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Test Includes
Fluorescence in situ hybridization (FISH) for myeloproliferative neoplasms/chronic myelogenous leukemia (MPN/CML) targeting numerical changes of chromosomes 8, 9, 13q14, and rearrangement of BCR/ABL1
Use
This test is used for confirmation/identification of chromosome abnormalities in interphase nuclei and leukemia monitoring of residual disease.
Special Instructions
Include pertinent clinical diagnosis and previous cytogenetic studies on the test request form.
Limitations
Molecular mutations or chromosomal alterations not targeted by the probe included in this profile will not be detected.
This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.
Specimen Requirements
Specimen
Whole blood, bone marrow, CSF, fixed-cell pellet from a cytogenetic analysis, slide with metaphase and/or interphase nuclei or bone marrow touch preparation slides are acceptable for testing.
Volume
5 mL whole blood (pediatric), 3 mL bone marrow, fixed-cell pellet from a cytogenetic analysis, 10 slides with metaphase and/or interphase nuclei or 10 touch preparation slides
Minimum Volume
1 mL whole blood (pediatric), 1 mL bone marrow, fixed-cell pellet from cytogenetic analysis, 5 slides with metaphase and/or interphase nuclei or 5 touch preparation slides (Note: Minimum volumes may not allow for repeat testing.)
Container
Green-top (sodium heparin) tube; pediatric Vacutainer® is optimal or lavender-top (EDTA) tube (suboptimal). For samples with shared karyotype (510999) and any FISH study in the same tube, EDTA is not recommended due to the growth inhibition in cell culture. Adjust tube size to sample volume to avoid heparin toxicity.
Collection Instructions
Utilize sterile technique and Labcorp transport kits when possible.
Storage Instructions
Transport to the testing laboratory at room temperature; use of a cool pack or a Labcorp transport kit is acceptable. Do not allow samples to overheat or freeze.
Causes for Rejection
Broken Vacutainer®; broken or stained slides; decalcified bone core; frozen specimen; quantity not sufficient for analysis
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 511425 | MPN/CML FISH | 511087 | Specimen Type | 31208-2 | ||
| 511425 | MPN/CML FISH | 511088 | Cells Counted | 62361-1 | ||
| 511425 | MPN/CML FISH | 511091 | Cells Analyzed | 62360-3 | ||
| 511425 | MPN/CML FISH | 511092 | FISH Result | 62356-1 | ||
| 511425 | MPN/CML FISH | 511093 | Interpretation | 62365-2 | ||
| 511425 | MPN/CML FISH | 511094 | Director Review: | 48672-0 | ||
| 511425 | MPN/CML FISH | 512123 | 11502-2 | |||
| Order Code | 511425 | |||||
| Order Code Name | MPN/CML FISH | |||||
| Order Loinc | ||||||
| Result Code | 511087 | |||||
| Result Code Name | Specimen Type | |||||
| UofM | ||||||
| Result LOINC | 31208-2 | |||||
| Order Code | 511425 | |||||
| Order Code Name | MPN/CML FISH | |||||
| Order Loinc | ||||||
| Result Code | 511088 | |||||
| Result Code Name | Cells Counted | |||||
| UofM | ||||||
| Result LOINC | 62361-1 | |||||
| Order Code | 511425 | |||||
| Order Code Name | MPN/CML FISH | |||||
| Order Loinc | ||||||
| Result Code | 511091 | |||||
| Result Code Name | Cells Analyzed | |||||
| UofM | ||||||
| Result LOINC | 62360-3 | |||||
| Order Code | 511425 | |||||
| Order Code Name | MPN/CML FISH | |||||
| Order Loinc | ||||||
| Result Code | 511092 | |||||
| Result Code Name | FISH Result | |||||
| UofM | ||||||
| Result LOINC | 62356-1 | |||||
| Order Code | 511425 | |||||
| Order Code Name | MPN/CML FISH | |||||
| Order Loinc | ||||||
| Result Code | 511093 | |||||
| Result Code Name | Interpretation | |||||
| UofM | ||||||
| Result LOINC | 62365-2 | |||||
| Order Code | 511425 | |||||
| Order Code Name | MPN/CML FISH | |||||
| Order Loinc | ||||||
| Result Code | 511094 | |||||
| Result Code Name | Director Review: | |||||
| UofM | ||||||
| Result LOINC | 48672-0 | |||||
| Order Code | 511425 | |||||
| Order Code Name | MPN/CML FISH | |||||
| Order Loinc | ||||||
| Result Code | 512123 | |||||
| Result Code Name | ||||||
| UofM | ||||||
| Result LOINC | 11502-2 |