Figure 2:
- Figure 2A and 2B: Lymph node biopsy showed sheets of interfollicular
lambda predominant plasmacytoid cells that express IgA.
- Figure 2C and 2D: Retroperitoneal lymph node biopsy showed an atypical
small B cell proliferation highlighted by CD20; the final diagnosis
was consistent with marginal zone lymphoma with plasmacytoid
differentiation.
- Figure 2E and 2F: Bone marrow biopsy showed Normocellular marrow
(80%) with 30-40% atypical kappa predominant plasma cells with
nuclear MUM1 expression, compatible with atypical plasma cells.