alexa The Expression of IgG and IgG4 in Lymphoma
ISSN: 2165-8048

Internal Medicine: Open Access
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Research Article

The Expression of IgG and IgG4 in Lymphoma

Juan Li1,2 and Zhuoli Zhang1*
1Department of Rheumatology and Clinical Immunology, Peking University First Hospital, Beijing, China
2Department of Rheumatology, Shanxi Dayi Hospital, Shanxi Academy of Medical Sciences, Shanxi, China
*Corresponding Author : Zhuoli Zhang
Department of Rheumatology and Clinical Immunology
Peking University First Hospital, No.8
Xishiku Street West District
Beijing, 100034, People's Republic of China, China
Tel: +86-10-83572064
Fax: +86-10-83572064
E-mail: [email protected]
Received June 16, 2014; Accepted July 23, 2014; Published July 30, 2014
Citation: Li J, Zhang Z (2014) Expression of IgG and IgG4 in Lymphoma. Intern Med 4:164 doi:10.4172/2165-8048.1000164
Copyright: © 2014 Li et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Objectives: Although IgG4-related disease has been gradually recognized, its relationship with malignant diseases, especially lymphoma has been an eternal topic. Therefore we set out to explore the expression of IgG4 positive cells in lymphoma.

Methods: Surgical excision specimens with definite diagnosis of lymphoma from January to December, 2013 were collected. Hematoxylin-eosin staining and immunohistochemical staining of IgG and IgG4 were then evaluated on dense lymphoplasmacytic infiltration, storiform fibrosis and obliterative phlebitis. For the quantification of IgG and IgG4 positive cells, the areas with the highest density of positive cells were evaluated. Three high-powered fields (hpf) in each section were analyzed, and the average number of positive cells per hpf was calculated.

Results: 16 patients with lymphoma were included in our study. There were 9 males and 7 females with an average age of 51 years old. 3 cases were diagnosed as Hodgkin lymphoma while 13 were non-Hodgkin lymphoma (diffuse large B cell lymphoma 8 cases, small B cell lymphoma 2 cases, mucosa associated lymphoid tissue marginal zone B cell lymphoma (MALToma) 1 case, follicular lymphoma, peripheral T-cell lymphoma and hepatosplenic T-cell lymphoma 1 case. Dense lymphocytic infiltration accompanied by atypical lymphocytes was observed in all the specimens. Proliferation of fibrous tissue was only seen in one specimen. IgG positive cells were detectable in 14 cases with the highest cell count from 20-350/hpf. 2 Hodgkin lymphoma cases showed of IgG4 positivity with the highest cell counts were 11 and 12/hpf respectively.

Conclusion: IgG4 positive cells, fibrosis and obliterative phlebitis barely appeared in lymphoma. In combination with specific tumor signature molecules, it may not be difficult to distinguish lymphoma from IgG4-related disease.


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