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The term "plasmablastic" is used for this lymphoma because the cells resemble plasma cells and have abundant immunoglobulin, but they lack IG somatic hyper-mutation.
This lymphoma is considered to be the same primary with the following: 1. Plasmablastic lymphoma (9735/3). The two diagnosis can be distinguished because plasmablastic lymphoma frequently show class-switched and hyper-mutated IG genes.
2. Primary effusion lymphoma (9678/3) may complicate HHV8 MCD but PEL neoplastic cells do no express immunoglobulin and are usually co-infected with EBV.