Test Name: MUM1
MUM1 protein is expressed in a subset of germinal center B cells, plasma cells and activated T cells. It is also expressed in a wide spectrum of hematolymphoid neoplasms derived from these cells and in melanomas are labeled. In particular, immunohistochemical staining for MUM1 is useful in the classification of aggressive B-cell lymphoma, as MUM1 expression is characteristic of non-germinal center diffuse large B-cell lymphoma and is not seen in Burkitt lymphoma.
A formalin-fixed, paraffin-embedded (FFPE) tissue block is preferred specimen type or one (1) unbaked, unstained slide cut at 4-5 microns for H&E staining (required) and two to three (2-3) positively charged unstained slides cut at 3-4 microns for each test/antibody ordered.
Storage and Transport
Use cold pack during transport of paraffin blocks and unstained slides. Cold pack should not be placed in direct contact with the specimen during shipping
Specimen Rejection Criteria
Turn Around Time (TAT): 2-3 Days
CPT Codes*: 88341, 88342, 88360
*The CPT codes provided with our Test Descriptions are based on AMA guidelines and are for informational purposes only. Correct CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed.