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Figure 1: (a) A reactive lymphocyte rich effusion mimicking lymphoma (MGG,100 ×). The larger cells (above the black asterisks) often have irregular, notched, or cleaved nucleus and prominent cytoplasm. (b) Reactive bone marrow showing lymphocytosis (black arrow) (H&E,100 ×). Marrow shows positivity for (c) CD20 and (d) CD3. (d, Inset) Tdt is negative. (IHC,100 ×) |
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