Test Name
trisomy 4
Test Code
F T4
Synonyms
+4, CEP 4
Associations
Pediatric acute lymphoblastic leukemia (ALL)
CPT Codes
88367x1
Turnaround Time
3-5 days
Specimen Requirements
2.0 mL (min. 1.0 mL) peripheral blood in sodium heparin preferred, EDTA accepted 1.0 mL (min. 0.5 mL) bone marrow in sodium heparin preferred, EDTA accepted 5 mm^3 fresh tissue in MPLN RPMI media 3.0 mL (min. 2.0 mL) FNA in MPLN RPMI media 10% neutral buffered formalin fixed paraffin embedded tissue
Specimen Stability
Peripheral blood and bone marrow stable at 18-25°C for 72 hours Fresh tissue or FNA stable at 2-8°C for 72 hours
Storage & Handling
Whole blood and bone marrow, ship ambient Fresh tissue, FNA or paraffin embedded tissue, ship in a Styrofoam container with a cool/refrigerated pack. (Do not allow cool pack to directly contact sample.)
Causes for Rejections
Clotted specimen; Specimen exposed to extreme temperature; Anticoagulant toxic to cells; Insufficient number of cells; Improper fixative
Description
Pediatric ALL; by FISH
