FLT3-ITD by PCR

Synonyms

CD135, Fms-like tyrosine kinase 3 (FLT-3), receptor-type tyrosine-protein kinase FLT3; 13q12

  • Tech Only CPT 81245
  • Tech Pro CPT
  • PowerPath Code FLT3-ITD
  • Schedule Monday - Friday (Variable)
  • Turn Around Time 2-4 days
  • Disease State Acute Myeloid Leukemia (AML) / Myeloid Sarcoma
  • Methodology PCR, PCR based fragment analysis by capillary electrophoresis

Organs

Bone Marrow; Peripheral Blood

Specimen Requirements

Minimum of 3 mL whole blood in a purple (EDTA) or pink top tube (EDTA); minimum of 1 mL of bone marrow aspirate in a purple, pink, or green (heparin) top tube.

Diagnostic Utility

FLT3-ITDs have been used as indicator for risk stratification on prognosis for cytogenetically normal acute myeloid leukemia (CN-AML).

Clinical Significance

FLT3 is a receptor tyrosine kinase that is expressed on early hematopoietic progenitor cells and plays an important role in stem cell survival and differentiation. Internal tandem duplication mutations arise from duplications of the juxtamembrane portion of the gene and result in constitutive activation of the FLT3 protein. This mutation has been identified in ~20-30% of patients with acute myelogenous leukemia (AML) and appears to be associated with a worse prognosis.

Required Patient Info

Copy of the referring client's requisition form to accompany specimen.

Storage and Transportation

Refrigerated: 5 days; ambient (room temperature): 3 days; specimen must be received by laboratory within 7-days of collection.

Cause for Rejection

Frozen specimen; clotted or grossly hemolyzed specimens; serum; specimens without 2 patient identifiers; serum or plasma, aliquots (previously open containers); specimens that were received >7-days after collection.

Retention

2 years DNA and raw data; whole blood and bone marrow - 1 week.

Comments

This test was developed and its performance characteristics determined by CellNetix Labs LLC. The U.S. Food and Drug Administration (FDA) has not approved or cleared this test. However, FDA approval or clearance is currently not required for clinical use of this test. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions. CellNetix is authorized under Clinical Laboratory Improvement Amendments (CLIA) to perform high-complexity testing.

Vendor

LDT