Test Id : SARCP

When this test is ordered, slide review will always be performed at an additional charge.

Multiple oncology (cancer) gene panels are available. For more information see Oncology Somatic NGS Testing Guide.

Pathology report (final or preliminary), at minimum containing the following information, must accompany specimen in order for testing to be performed:

1. Patient name

2. Block number-must be on all blocks, slides and paperwork (can be handwritten on the paperwork)

3. Tissue collection date

4. Source of the tissue

This assay requires at least 10% tumor nuclei.

-Preferred amount of tumor area with sufficient percent tumor nuclei: tissue 144 mm(2)

-Minimum amount of tumor area: tissue 36 mm(2)

-These amounts are cumulative over up to 10 unstained slides and must have adequate percent tumor nuclei.

-Tissue fixation: 10% neutral buffered formalin, not decalcified

-For specimen preparation guidance, see Tissue Requirement for Solid Tumor Next-Generation Sequencing in Special Instructions. In this document, the sizes are given as 4mm x 4mm x 10 slides as preferred: approximate/equivalent to 144 mm(2) and the minimum as 3mm x 1mm x 10 slides: approximate/equivalent to 36mm(2).

Preferred:

Specimen Type: Formalin-fixed, paraffin-embedded (FFPE) tissue

Container/Tube: Tissue block

Collection Instructions: Submit a formalin-fixed, paraffin-embedded tissue block.

Acceptable:

Specimen Type: FFPE Tissue

Slides: 1 Stained and 10 unstained

Collection Instructions: Submit 1 slide stained with hematoxylin and eosin and 10 unstained, nonbaked slides with 5-micron thick sections of the tumor tissue.

Specimen Type: Cytology slide (direct smears or ThinPrep)

Slide: 1 to 3 slides

Collection Instructions: Submit 1 to 3 slides stained and coverslipped with a preferred total of 5000 nucleated cells or a minimum of at least 3000 nucleated cells.

Note: Glass coverslips are preferred; plastic coverslips are acceptable but will result in longer turnaround times.

Additional Information: Cytology slides will not be returned.

• Tissue Requirements for Solid Tumor Next-Generation Sequencing
• Sarcoma Targeted Gene Fusion Panel
• Common BCOR Tandem Duplications

If not ordering electronically, complete, print, and send a Oncology Test Request (T729) with the specimen.

See Specimen Required

Diagnosing specific soft tissue and bone tumors (sarcoma) based on the observed gene fusions (eg, PAX3/FOXO1 gene fusion observed in alveolar rhabdomyosarcoma, EWSR1-FLI1 gene fusion for Ewing’s sarcoma, SS18-SSX1/2 gene fusion for synovial sarcoma)

This test evaluates 138 gene targets for the presence of somatic gene fusions and also assesses for common BCOR internal tandem duplications. See Sarcoma Targeted Gene Fusion Panel and Common BCOR Tandem Duplications in Special Instructions for details regarding the targeted gene regions identified by this test.

When this test is ordered, slide review will always be performed at an additional charge.

Molecular analysis of biomarkers is increasingly being utilized in oncology practices to support and guide diagnosis, prognosis, and therapeutic management of patients. Chromosomal translocations, interstitial deletions, and inversions that lead to gene fusions are common in various sarcomas such as Ewing sarcoma and rhabdomyosarcoma. This next-generation sequencing assay is used to detect specific gene fusions to assist in the diagnosis of sarcomas. See Sarcoma Targeted Gene Fusion Panel in Special Instructions for details regarding the targeted gene regions identified by this test.

An interpretive report will be provided.

An interpretive report will be provided.

This assay is not validated for the detection of point variations, indels, copy number alterations, or gene expression.

This assay may detect gene fusions that are present at the RNA level, but not the DNA level, that result from cis-splicing of adjacent genes or trans-splicing.(1)

This panel can detect in-frame and out-of-frame fusions. There may be lower sensitivity in detecting out-of-frame fusions such as exon-intron, intron-intron or big insertions. This assay will only detect fusions involving at least 1 gene in the defined genes of interest list.

This assay will only detect fusions involving gene transcripts that have been defined in UCSC Genome Browser (March 2012 version) available from Illumina's iGenomes Project.(2)

Reliable results are dependent on adequate specimen collection and processing. This test has been validated on cytology slides and formalin-fixed, paraffin-embedded tissues; other types of fixatives are discouraged. Improper treatment of tissues, such as decalcification, may cause PCR failure.

A negative result does not rule out the presence of a gene fusion that may be present but below the limits of detection of this assay (tumor cells comprise <10% of the cell population; targeted fusion read coverage with <10 unique fusion molecules in a sample).

The limit of detection of this assay for specific gene fusions is dependent on a number of variables including decreased sensitivity with decreased tumor percentage and decreased sensitivity with decreased level of expression of the gene fusion.

RNA is particularly labile and degrades quickly. Rapid preservation of the tumor sample after collection reduces the likelihood of degradation but there are sometimes biological factors such as tumor necrosis which interfere with obtaining a high quality RNA specimen despite rapid preservation.

The presence or absence of a fusion may not be predictive of response to therapy or prognosis in all patients.

Fusions of uncertain significance may be identified.

In a verification study, this next-generation sequencing (NGS) assay was performed in 111 sarcoma formalin-fixed, paraffin-embedded (FFPE) and cytology samples (86 fusion positive and 25 fusion negative). The NGS assay results were confirmed by RT-PCR and FISH tests. The overall accuracy of the NGS assay was 95.5% (106/111). No targeted gene fusions were detected in 20 negative control samples (100% specificity).

1. Jia Y, Xie Z, Li H: Intergenically Spliced Chimeric RNAs in Cancer. Trends Cancer 2016;2:475-482. doi: 10.1016/j.trecan.2016.07.006

2. Jo VY, Fletcher CD: WHO classification of soft tissue tumours: an update based on the 2013 (fourth) edition. Pathology 2014;46:95-104. doi: 10.1097/PAT.0000000000000050

3. Fletcher CD: The evolving classification of soft tissue tumours - an update based on the new 2013 WHO classification. Histopathology 2014;64:2-11. doi: 10.1111/his.12267

4. Quesada J, Amato R: The Molecular Biology of Soft-Tissue Sarcomas and Current Trends in Therapy. Sarcoma 2012:1-15. doi: 10.1155/2012/849456

5. Podnar J, Deiderick H, Huerta G, Hunicke-Smith S: Next-Generation Sequencing RNA-Seq Library Construction. Curr Protoc Mol Biol 106:2014;unit 4.21:1-19

6. Mertens F, Tayebwa J: Evolving techniques for gene fusion detection in soft tissue tumours. Histopathology 2014;64:151-162. doi: 10.1111/his.12272

7. AI-Zaid T, Wang WL, Somaiah N, Lazar AJ: Molecular profiling of sarcomas: new vistas for precision medicine. Virchows Arch 2017;471:243-255

8. Gao Q, Liang WW, Foltz SM, et al: Driver Fusions and Their Implications in the Development and Treatment of Human Cancers. Cell Rep 2018;23:227-238. doi: 10.1016/j.celrep.2018.03.050

9. Lam SW, Cleton-Jansen AM, Cleven AHG, et al: Molecular Analysis of Gene Fusions in Bone and Soft Tissue Tumors by Anchored Multiplex PCR-Based Targeted Next-Generation Sequencing. J Mol Diagn 2018;20:653-663. doi: 10.1016/j.jmoldx.2018.05.007

10. Roy A, Kumar V, Zorman B, et al: Recurrent internal tandem duplications of BCOR in clear cell sarcoma of the kidney. Nat Commun 2015 Nov 17;6:8891. doi: 10.1038/ncomms9891

11. Marino-Enriquez A, Lauria A, Przybyl J, et al: BCOR Internal Tandem Duplication in High-grade Uterine Sarcomas. Am J Surg Pathol 2018 Mar;42(3):335-341. doi: 10.1097/PAS.0000000000000993

• Tissue Requirements for Solid Tumor Next-Generation Sequencing
• Sarcoma Targeted Gene Fusion Panel
• Common BCOR Tandem Duplications

RNA-based next-generation sequencing is performed to test for the presence of rearrangements involving targeted regions of 138 fusion genes. See Sarcoma Targeted Gene Fusion Panel and Common BCOR Tandem Duplications in Special Instructions for details regarding the targeted gene regions identified by this test.(Unpublished Mayo method)

Monday through Friday

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• Clients without access to Test Prices can contact Customer Service 24 hours a day, seven days a week.
• Prospective clients should contact their Regional Manager. For assistance, contact Customer Service.

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

81479

Slide Review

88381-Microdissection, manual

Sample Reports

Normal and Abnormal sample reports are provided as references for report appearance.

Normal Reports | Abnormal Reports

SI Sample Reports

International System (SI) of Unit reports are provided for a limited number of tests. These reports are intended for international account use and are only available through MayoLINK accounts that have been defined to receive them.

SI Normal Reports | SI Abnormal Reports