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Epic Code LAB2111362 CHIC2, 4q12 Deletion (FIP1L1, PDGFRA Rearrangement) by FISH

Test Name Alias

CHIC (4q12) by FISH | 948

Interface Order Alias

11376

Quick Collect

AP Ambient

Clinical Information

Fluorescence in situ hybridization (FISH) performed using the 4q12 Tri-Color Rearrangement Probe. This probe is useful for detection of chromosomal breaks that occur within PDGFRA, including translocations or interstitial deletions of 4q12 that result in the fusion of FIP1L2 with PDGFRA. These abnormalities are seen in patients with myeloid neoplasms associated with eosinophilia.

 

Routine chromosome analysis is performed on all diagnostic samples and is recommended on all bone marrow specimens to exclude abnormalities not identified by the specified FISH probe(s).

Collection Instructions

Multiple specimen collection types. Submit only one:

 

Specimen Collection: Bone Marrow

Container(s): Green Top (Sodium Heparin)

Preferred volume to collect: 5.0 mL

Minimum volume to collect: 1.0 mL

Neonate volume to collect: 1.0 mL

Collection Instructions:

  • Collect bone marrow and transfer marrow from syringe to plain green top sodium heparin tube. 
  • A bone marrow sample is the preferred sample type for testing.

 

Specimen Collection: Peripheral blood
Container/Tube: Green Top (Sodium Heparin)

Preferred volume to collect: 8.0 mL

Minimum volume to collect: 0.5 mL

Neonate volume to collect: 0.5 mL

Collection Instructions:

  • Peripheral blood may be substituted for Bone Marrow if circulating blasts are present 
  • Collect peripheral blood into a plain green top sodium heparin tube. 
  • Keep sample at room temperature and send to the Lab immediately. 

Processing Instructions (Laboratory, Outpatient or Off-site collection)

Spin: N

Aliquot: N

 

Transport Temperature: Ambient

 

If ambient temperature exceeds 80°F or is below 40°F, please send in an insulated container. All samples should be directed to the laboratory as soon as possible.

Specimen Stability

Ambient: 3 days for fresh specimens (beyond 3 days, specimen viability will be detemined by Cytogenetics Lab)

Laboratory Retention: primary specimens 4 weeks; frozen pellets retained greater than 1 year

Test Frequency

Test Set Up: Monday – Friday 8:00 am – 5:00 pm, Saturday 8:00 am – 3:00 pm.

Technologist on call for Sunday set up.

Final report: 2 – 3 days.

Reference Range

An interpretative report will be provided.

Performing Department

Cytogenetics

Performing Department Laboratory Location

Corewell Health Advanced Technology Laboratory (ATL), Grand Rapids, MI

Methodology

Performed by fluorescence in situ hybridization (FISH). This test was developed and its performance characteristics determined by Spectrum Health Cytogenentics Laboratory. It has not been cleared or approved by the US FDA. The FDA has determined that such clearance or approval is not necessary. This test is used for clinical purposes.

CPT

88275, 88271 x3

CDM Code

3108827102, 3108827501

Epic Test ID

1230100473

LOINC

Specimen Type: 66746-9

Indication Provided: 42349-1

Result: in process

Interpretation: 59050-5

Comments: 69965-2

Reviewed Date

4/28/2023