Trisomy 12, FISH, D12Z3

Trisomy 12, FISH, D12Z3
WSLH Department: Cytogenetics
WSLH Test Code:870F51
CPT Code: 
Price: 
Includes:FISH analysis of 200 interphase cells for copy number of chromosome 12 using a probe for the centromere of chromosome 12 (D12Z3)
Methodology:**(CPT Codes: 88271, 88275)** Fluorescence in situ hybridization performed on interphase nuclei using a DNA probe (CEP 12; Vysis, Inc) specific for the centromere of chromosome 12. This probe is designed to detect trisomy 12.
Availability:Monday-Friday 7:45 AM - 4:30 PM, Saturday 7:45 AM - 12:00 PM
Turn-around Time:Approximately 2-4 days. (Reports are issued Monday-Friday 7:45 AM - 4:30 PM)
Recommended Uses:Detection of trisomy 12 associated with lymphoid disorders including CLL and NHL. Aids in diagnosis and prognosis of hematologic disorders and in monitoring disease after treatment or bone marrow transplant. May be performed in conjunction with other FISH assays, chromosome analysis or as an independent test.
Contraindications: 
Specimen Requirements:Bone marrow: 0.5-1.0 ml early aspirate bone marrow collected in sodium heparin OR Blood: 1-2 ml whole blood collected in sodium heparin vacuum type tube
Collection Kit/Container: 
Patient Preparation: 
Collection Instructions:** Bone marrow: 0.5-1.0 ml bone marrow from the 1st or 2nd aspirate. Material submitted for cytogenetic analysis must be from an early aspirate to avoid dilution with blood. Rinse the syringe to be used for aspiration by drawing sodium heparin solution (1000 USP units/ml) into the syringe and then expelling all the heparin solution (over-heparinization is toxic to the cells). Transfer the marrow to a sterile, sodium heparin vacuum type tube for delivery to State Lab. If an aspirate is unsuccessful, a 10mm bone core biopsy may be submitted in a sterile transport medium with sodium heparin. ** Blood: Draw blood using aseptic techniques into a sterile sodium heparin vacuum type tube. Invert tube to mix. If using larger tubes, draw full tube of blood to avoid over-treatment with anti-coagulant.
Specimen Handling and Transport:Store and transport specimens at room temperature (may transport with coolant during hot, >85 degrees F weather). DO NOT FREEZE. The laboratory must receive specimens within 24 hours of collection.
Unacceptable Conditions:Bone marrow/blood that is clotted or hemolyzed is not acceptable. Bone marrow/blood must not be frozen. Plasma and serum are not acceptable.
Requisition Form:Cytogenetics Lab Neoplasia Diagnosis Form #132
Required Information:Laboratory regulations require the following minimum information to be provided on the requisition form for a specimen to be accepted for testing: Patient name or unique identifier; date and time of collection, patient date of birth and sex, specimen type/site of collection, test request(s), reason for referral, clinician name and UPIN/NPI, and address for reporting results. Please be certain that name/identifier on the form matches that on the specimen label.
Results include:Number of nuclei examined, percent positive for trisomy 12, and the reference range for false positives based on the average number of cells with an abnormal signal pattern in two hundred control cells. Karyotype written using International System for Human Cytogenetic Nomenclature (ISCN) 2013 and interpretation of results.
Limitations:Failure to identify an abnormal clone by FISH does not rule out the presence of other abnormalities in the specimen.
Additional Tests Recommended: 
Additional Comments:If FISH assay is not performed in conjunction with chromosome analysis there is an additional charge for processing the specimen.
Additional Tests Performed: 

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