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Peritrabecular and diffuse infiltration by a follicular lymphoma (infiltration volume 80%).
Bone Marrow
CD20 (L26)
43 years
43-year old male patient with a known follicular lymphoma.
The immunohistochemical stain for CD20 highlights the peritrabecular growth pattern, which is typical for follicular lymphomas.
The lymphoid cells stained positive for CD20, CD10 and bcl-6, as well as bcl-2. CD5 and CD23 were both negative.
Philippe Brunner, University of Basel
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