Pediatric Acute Lymphoblastic Leukemia (ALL) Profile, FISH

TEST: 510324
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Synonyms

  • Acute Lymphocytic Leukemia (ALL), Pediatric

Test Includes

Fluorescence in situ hybridization (FISH) for acute lymphoblastic leukemia (ALL), targeting rearrangement of BCR-ABL, TCF3, KMT2A (MLL), ETV6/RUNX1, and numerical changes of 4, 10, 17, and CDKN2A deletion.

Special Instructions

Indicate pertinent clinical diagnosis and previous cytogenetic studies on the test request form.

Expected 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.

Related Information

Related Documents

Specimen Requirements

Specimen

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 blood (pediatric), 3 mL bone marrow, fiexed-cell pellet from a cytogenetic analysis, 12 slides with metaphase and/or interphase nuclei or 12 touch preparation slides.

Minimum Volume

1 mL blood (pediatric), 1 mL bone marrow, fixed-cell pellet from a cytogenetic analysis, 6 slides with metaphase and/or interphase nuclei or 6 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). Adjust tube size to sample volume to avoid heparin toxicity.

Collection

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.

Storage Instructions

Maintain the specimen at either room temperature or refrigerate. Do not freeze.

Causes for Rejection

Broken Vacutainer®; broken or stained slides; paraffin blocks; paraffin slides; decalcified bone cores; frozen specimen; quantity not sufficient for analysis

Test Details

Use

Diagnostic and prognostic test for acute lymphoblastic leukemia in the pediatric population; detection rate is improved from 50% with a chromosome study to 90% with FISH

Limitations

Molecular mutations or chromosomal alterations not targeted by the probes included in this profile will not be detected.

Methodology

Fluorescence in situ hybridization (FISH)

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
510324 FISH Pediatric ALL Oncology 510709 Specimen Type 31208-2
510324 FISH Pediatric ALL Oncology 510687 Cells Counted 62361-1
510324 FISH Pediatric ALL Oncology 510688 Cells Analyzed 62360-3
510324 FISH Pediatric ALL Oncology 510689 FISH Result 48674-6
510324 FISH Pediatric ALL Oncology 510326 Interpretation 50398-7
510324 FISH Pediatric ALL Oncology 510327 Director Review: 48672-0
510324 FISH Pediatric ALL Oncology 512123 PDF 51967-8

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The LOINC® codes are copyright © 1994-2021, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. Permission is granted in perpetuity, without payment of license fees or royalties, to use, copy, or distribute the LOINC® codes for any commercial or non-commercial purpose, subject to the terms under the license agreement found at https://loinc.org/license/. Additional information regarding LOINC® codes can be found at LOINC.org, including the LOINC Manual, which can be downloaded at LOINC.org/downloads/files/LOINCManual.pdf