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. 2011 Oct 13;6:99. doi: 10.1186/1746-1596-6-99

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Copyright ©2011 Dou et al; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Photomicrographs of histological changes of the affected lymph node. (A). Lymph node involved showing diffuse small lymphocyte-like cells and patches of homogenous materials in the dark background of proliferating cells. (HE staining×400). (B) The proliferating cells are CD5 positive by immunohistochemistry (×200). (C). The deposit was strongly Congon-Red positive. (×200). (D). Strong positivity of κ light chain demonstrated by immunohistochemistry (×100). (E). The deposit was completely negative for λlight chain. (×200).