Veripath Test Directory

Synonyms RUNX1T1/RUNX1 gene rearrangement by FISH t(8;21) FISH
Description Fluorescence In situ hybridization (FISH) Is performed to detect the (8;21)
translocation seen as a recurrent aberration In acute myeloid leukemia.
Specimen Requirements 
Container Green top (sodium heparin) collection tube
Specimen Type Bone marrow, blood, tissue
Preferred Collection Volume 2 mL bone marrow, 5-10 ml blood, 5mm³ tissue
Minimum Collection Volume
Collection Instructions 1. Bone Marrow: 2 mL aspirated bone marrow preferred) anticoagulated with preservative-free sodium heparin (e.g., green­ top tube). DO NOT use lithium heparin. Bone marrow biopsy may be submitted if aspirate is not available - see instructions for
Specimen Handling Deliver to lab at room temperature within 24 hours. If collected over a weekend, call the laboratory to make arrangements for specimen delivery. May be refrigerated if not transported immediately. Do not freeze. Protect from heat or cold.
Rejection Criteria
Methodology A fluorescent labeled dual colored DNA probe set for the RUNX1T1 gene, at chromosome band 8q22, and the RUNX1 gene,at chromosome band 21q22, are hybridized to unstained Interphase nuclei. 200 cells are evaluated to determine If the signals are discreet (no translocation) or fused (translocation).
Reference Range
CPT Code(s) 88271x2. 88275, 88291
Department Cytogenetics
Contact Information Lab: (214) 648-0975, Cutomer Service:(214) 645-7057 or Toll free: (877)-887-8136
Turn Around Time1-3 Days
Performed Sunday - Saturday
Performed by Cytogenetics
Notes Conventional cytogenetic analysis should be performed In addition to FISH at Initial diagnosis.
Updated/Reviewed 12/12/2016