3001305
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EWSR1 (22q12) Gene Rearrangement by FISH

EWSR1_FISH
Example Reports
Negative
Positive

Ordering Recommendation

Diagnose members of the Ewing sarcoma family of tumors (ESFT). Does not identify the translocation partner.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
Collect

Tumor tissue.

Specimen Preparation

Formalin fix (10 percent neutral buffered formalin) and paraffin embed tissue. Protect paraffin block from excessive heat.  Transport tissue block or 5 unstained (4-micron thick sections) positively charged slides in a tissue transport kit (ARUP supply #47808) available online through eSupply using ARUP Connect (TM) or contact ARUP Client Services at 800-522-2787 (kit recommended but not necessary). (Min. 2 slides)

Storage/Transport Temperature

Room temperature. Also acceptable: Refrigerated. Ship in cooled container during summer months.

Unacceptable Conditions

Paraffin block with no tumor tissue remaining. Specimens fixed in any fixative other than 10 percent neutral buffered formalin. Decalcified specimens.

Remarks

Include surgical pathology report.
If multiple specimens (blocks or slides) are sent to ARUP, they must be accompanied by one of the following: an order comment indicating that the ARUP pathologist should choose the specimen most appropriate for testing (e.g., "Choose best block"), or individual orders for each sample submitted. A Pathologist Block Selection Fee (ARUP test code 3002076) will be added to orders that utilize the first option. If multiple specimens are sent to ARUP without a request for pathologist block/slide selection or individual orders, they will be held until clarification is provided.

Stability

Ambient: Indefinitely; Refrigerated: Indefinitely; Frozen: Unacceptable

Methodology

Fluorescence in situ Hybridization (FISH)

Performed

Mon-Fri

Reported

3-7 days

Reference Interval

Interpretive Data



Compliance Category

Analyte Specific Reagent (ASR)

Note

Hotline History

N/A

CPT Codes

88366

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Components

Component Test Code* Component Chart Name LOINC
3000639 EWSR1 FISH Reference Number
3000640 EWSR1 FISH Source
3000641 EWSR1 FISH Result
3000703 Scoring Method 81304-8
3002940 Total Cell Count 78236-7
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • 22q12
  • EWSR1 Gene rearrangement
  • EWSR1 FISH
EWSR1 (22q12) Gene Rearrangement by FISH