MYD88 Exon 5 Sequencing
Label Mnemonic: | MYD88, MYD88BL, MYD8 |
Epic code: | LAB8392 (FFPE Tissue) LAB8462 (Blood) LAB8463 (Marrow) |
Downtime form: | Doctor/Provider Orders - Pathology Molecular |
Molecular Pathology
6240 RCP
384-9568
6240 RCP
384-9568
Specimen(s):
FFPE Tissue, Peripheral Blood, Bone Marrow Aspirate
Formalin Fixed, Parafin Embedded Tissue Block
10 unstained 5-10 μM thick slides at 20-25°C and an H&E slide of the tissue or clot.
Formalin Fixed, Parafin Embedded Tissue Block
10 unstained 5-10 μM thick slides at 20-25°C and an H&E slide of the tissue or clot.
Collection Medium:
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Pink top tube 6 mL (K2-EDTA) |
Minimum:
Collect 5-10 mL Peripheral Blood in EDTA (in TWO Pink tubes)
Testing requires a dedicated tube.
Collect 3-5 mL Bone Marrow Aspirate in EDTA Pink top tube)
Testing requires a dedicated tube.
Absolute Minimum: 1 mL Bone Marrow
Tissue (fresh or formalin fixed paraffin embedded)
Testing requires a dedicated tube.
Collect 3-5 mL Bone Marrow Aspirate in EDTA Pink top tube)
Testing requires a dedicated tube.
Absolute Minimum: 1 mL Bone Marrow
Tissue (fresh or formalin fixed paraffin embedded)
Rejection Criteria:
Frozen, clotted or severely hemolyzed specimens are NOT acceptable.
Specimens that have been decalcified or fixed in B5 fixative will not
be accepted. Tumor specimens with inadequate cellular material or a
tumor percentage will be rejected.
Turn Around
Time:
6-10 days
Comments:
Myeloid differentiation primary response 88 (MYD88) encodes a
cytosolic adapter protein that is frequently mutated in
Waldenström macroglobulinemia (WM) and lymphoplasmacytic lymphoma
(LPL). Approximately 90% of cases harbor a leucine to proline mutation
at codon 265 (p.L265P, c.794T>C) in exon 5. Detection of MYD88 L265P
can help establish a diagnosis of LPL in patients with typical
histologic and flow cytometry findings as it rarely occurs in marginal
zone lymphoma or chronic lymphocytic leukemia. MYD88 mutation status
may also assist with risk stratification of IgM monoclonal gammopathy
of undetermined significance or MGUS as patients who have the mutation
are possibly at increased risk of progression to WM or LPL.
Methodology:
Massively parallel Next Generation DNA sequencing by synthesis,
semiconductor technology, Ion Personal Genomics Machine
CPT Code:
81305