Chapter 8 The lymphorecticular system and bone marrow/Fig 8.16.jpg

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The bone marrow is extensively involved by follicular lymphoma. (A) This low-power H&E view shows a band of small lymphoid cells involving the area immediately adjacent to the bony trabecula (paratrabecular). (B) A parallel section is stained for CD20 (a B-lymphocyte marker) by immunocytochemistry, thus confirming the B-cell nature of the infiltrate.