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HelpTest Code NGPCM MayoComplete Plasma Cell Myeloma, Next-Generation Sequencing, Varies
Shipping Instructions
Bone marrow aspirate samples must arrive within 4 days of collection.
Specimen Required
Submit only 1 of the following specimens:
Specimen Type: Bone marrow aspirate
Container/Tube: Lavender or pink top (EDTA) or yellow top (ACD)
Specimen Volume: 2 mL
Collection Instructions:
1. Minimum plasma cell percentage is 5%.
2. Invert several times to mix bone marrow.
3. Send bone marrow specimen in original tube. Do not aliquot.
4. Label specimen as bone marrow.
5. Fresh specimen is required for this test, as testing is performed on sorted cells.
Specimen Stability Information: Ambient (preferred) 4 days/Refrigerate
Specimen Type: Paraffin-embedded bone marrow clot
Container/Tube: Paraffin block
Collection Instructions:
1. Send 1 slide stained with hematoxylin and eosin.
2. Minimum plasma cell percentage is 20%.
3. Required amount of tissue area is at least 25mm(2).
4. Tissue should be fixed in 10% neutral-buffered formalin. Other fixatives are not acceptable.
5. Decalcified specimens (eg, bone marrow core biopsies) are not acceptable.
Specimen Stability Information: Ambient
Specimen Type: Tissue slide; bone marrow clot
Slides: 10 unstained slides
Container/ Tube: Transport in plastic slide holders.
Collection Instructions:
1. Send 10 unstained, nonbaked slides with 5-micron thick sections of tissue and 1 slide stained with hematoxylin and eosin
2. Minimum amount of plasma cells is 20%
3. Required amount of tissue area is at least 25mm(2).
4. Tissue should be fixed in 10% neutral-buffered formalin. Other fixatives are not acceptable.
5. Decalcified specimens (eg, bone marrow core biopsies) are not acceptable.
Specimen Stability Information: Ambient
Forms
1. Hematopathology Patient Information (T676)
2. If not ordering electronically, complete, print, and send an Hematopathology/Cytogenetics Test Request (T726) with the specimen.
Secondary ID
618479Useful For
Evaluating multiple myeloma at the time of diagnosis and at disease relapse or when changing clinical management to provide prognostic information and determine potential therapeutic implications
Highlights
Next-generation sequencing detection of somatic gene variations in plasma cell myeloma may have prognostic and potential therapeutic implications. This test is appropriate for diagnosis and disease relapse.
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| CSPMM | NGPCM Pre-Analysis Cell Sorting, BM | No | No |
Testing Algorithm
See Targeted Genes Interrogated by MayoComplete Plasma Cell Myeloma Next-Generation Sequencing for a list of the genes and exons targeted by this assay.
Special Instructions
Method Name
Next-Generation Sequencing (NGS)
Reporting Name
Plasma Cell Myeloma, NGS, VSpecimen Type
VariesSpecimen Minimum Volume
Bone marrow aspirate: 1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Varies | Varies | ||
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
| Specimens that have been decalcified (all methods) Bone marrow core biopsies Paraffin shavings Frozen tissue Extracted DNA Moderately to severely clotted bone marrow aspirate |
Reject |
Clinical Information
Multiple myeloma (MM) is a malignancy of bone marrow plasma cells with an annual global incidence of nearly 200,000. Comprehensive clinical, radiologic, and laboratory evaluation can initially stratify patients by disease phase and burden. Cytogenetic and fluorescence in situ hybridization studies are important to help classify MM into standard, intermediate, and high-risk groups. Advances in nontargeted therapies, including autologous bone marrow transplantation, have significantly improved the outcome of many patients; however, most patients with myeloma suffer relapse after initial treatment. Clinical next-generation sequencing (NGS) technology has enabled a deeper and more detailed evaluation of MM genetics. Testing allows for further risk categorization of the disease through the identification of additional genetic abnormalities of prognostic and potentially therapeutic value. Application of targeted NGS-based analysis is a useful adjunct to the standard evaluation of MM patients at diagnosis and relapse. This test comprises a DNA-based multigene panel that includes preanalytic plasma cell enrichment, NGS, and detailed analysis, resulting in a clinical report.
Reference Values
An interpretive report will be provided.
Interpretation
Genomic variants detected by this test will be documented in a detailed laboratory-issued report. This report will contain information regarding the detected alterations and their associations with prognosis or possible therapeutic implications in plasma cell myeloma. The information in the clinical report may be used by the patient’s clinician to help guide decisions concerning management. Final interpretation of next-generation sequencing results requires correlation with all relevant clinical, pathologic, and laboratory findings and is the responsibility of the managing clinician.
Cautions
This test is a targeted next-generation sequencing (NGS) panel assay that encompasses 26 genes with variable full exon, partial region (including select intronic or noncoding regions), or hot spot coverage (depending on specific genetic locus). Therefore, this test will not detect other genetic abnormalities in genes or regions outside the specified target areas. The test detects single base substitutions (ie, point mutations), as well as small insertion or deletion type events. This test is not configured to detect structural genomic rearrangements (ie, translocations), gene fusions, copy number alterations, or large-scale (segmental chromosome region) deletions and other complex genomic changes.
This assay does not distinguish between somatic and germline alterations in analyzed gene regions, particularly with variant allele frequencies near approximately 50% or 100%. If nucleotide alterations in genes associated with germline mutation syndromes are present and there is a strong clinical suspicion or family history of malignant disease predisposition, additional genetic testing and appropriate counseling may be indicated. Some apparent mutations classified as variants of undetermined significance may represent rare or low population frequency polymorphisms.
Prior treatment for hematologic malignancy could affect the results obtained in this assay. In particular, prior allogeneic hematopoietic stem cell transplant may cause difficulties in either resolving somatic or polymorphic alterations or assigning variant calls correctly to donor and recipient fractions, if pertinent clinical or laboratory information (eg, chimerism engraftment status) is not provided.
NGS testing should not be pursued if the initial plasma cell percentage is below approximately 5% by cytologic differential count in the bone marrow aspirate, as the ability to obtain a sufficiently enriched target plasma cell population for evaluation is significantly less likely. Inadequate samples (eg, insufficient DNA quantity or quality) will preclude further testing and will be noted in the interpretive report.
Clinical Reference
1. Swerdlow S, Campo E, Harris NL, et al, eds: WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues. 4th ed. IARC Press; 2017. WHO Classification of Tumours, Vol 2
2. Onaindia A, Medeiros LJ, Patel KP. Clinical utility of recently identified diagnostic, prognostic, and predictive molecular biomarkers in mature B-cell neoplasms. Mod Pathol. 2017 Oct;30(10):1338-1366. doi: 10.1038/modpathol.2017.58
3. Walker BA, Mavrommatis K, Wardell CP, et al: Identification of novel mutational drivers reveals oncogene dependencies in multiple myeloma. Blood. 2018 Aug 9;132(6):587-597. doi: 10.1182/blood-2018-03-840132
4. Walker BA, Boyle EM, Wardell CP, et al: Mutational spectrum, copy number changes, and outcome: Results of a sequencing study of patients with newly diagnosed myeloma. J Clin Oncol. 2015 Nov 20;33(33):3911-20. doi: 10.1200/JCO.2014.59.1503
5. Kortuem KM, Braggio E, Bruins L, et al: Panel sequencing for clinically oriented variant screening and copy number detection in 142 untreated multiple myeloma patients. Blood Cancer J. 2016 Feb 26;6(2):e397. doi: 10.1038/bcj.2016.1
6. Jimenez C, Jara-Acevedo M, Corchete LA, et al: A next-generation sequencing strategy for evaluating the most common genetic abnormalities in multiple myeloma. J Mol Diagn. 2017 Jan;19(1):99-106
7. Yellapantula V, Hultcrantz M, Rustad EH, et al: Comprehensive detection of recurring genomic abnormalities: a targeted sequencing approach for multiple myeloma. Blood Cancer J. 2019 Dec 11;9(12):101. doi: 10.1038/s41408-019-0264-y
8. Cutler SD, Knopf P, Campbell CJV, et al: DMG26 A targeted sequencing panel for mutation profiling to address gaps in the prognostication of multiple myeloma. J Mol Diagn. 2021 Dec;23(12):1699-1714
Method Description
This is a laboratory-developed target enriched next generation sequencing (NGS) panel. DNA is extracted from validated specimen sources including bone marrow aspirate and formalin-fixed paraffin embedded tissues (eg, bone marrow clot). Bone marrow aspirate specimens are enriched for plasma cells sorted by a flow cytometric cell selection method prior to DNA extraction. Library preparation for NGS is performed followed by probe hybridization and capture. Sequencing of the final sample library is performed on a NGS instrument. Following bioinformatic processing of the sequencing data, the sequencing results are interpreted to provide a final clinical report. Genomic alterations are called according to human genome reference build GRCh37 (hg19).(Unpublished Mayo method).
Day(s) Performed
Monday through Friday
Report Available
16 to 21 daysSpecimen Retention Time
Bone marrow aspirate: 2 weeks; DNA: 3 months; FFPE tissue block: Unused portions of blocks will be returned to the client; Unstained slides: Not retainedPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. It has not been cleared or approved by the US Food and Drug Administration.CPT Code Information
81450
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| NGPCM | Plasma Cell Myeloma, NGS, V | 104241-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| MP074 | Specimen Type | 31208-2 |
| MP075 | Indication for Test | 42349-1 |
| 618515 | NGPCM Result | No LOINC Needed |
| 618516 | Pathogenic Mutations Detected | 82939-0 |
| 618517 | Interpretation | 69047-9 |
| 618519 | Variants of Unknown Significance | 93367-1 |
| 618520 | Additional Information | 48767-8 |
| 618518 | Clinical Trials | 82786-5 |
| 618521 | Method Summary | 85069-3 |
| 618522 | Disclaimer | 62364-5 |
| 618523 | Panel Gene List | 36908-2 |
| 618524 | Reviewed By | 18771-6 |