Published in:
01-12-2010 | Case Report
Lymphadenopathy of IgG4-related sclerosing disease: three case reports and review of literature
Authors:
Ikuo Shimizu, Kentaro Nasu, Keijiro Sato, Hiromitsu Ueki, Daigo Akahane, Masahiko Sumi, Mayumi Ueno, Naoaki Ichikawa, Naoko Asano, Masaru Kojima, Hikaru Kobayashi
Published in:
International Journal of Hematology
|
Issue 5/2010
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Abstract
Immunoglobulin (Ig) G4-related sclerosing disease is a recently described syndrome characterized by lymphoplasmacytic infiltration of exocrine glands or extranodal tissues and elevated serum IgG4. We report three cases of lymphadenopathy secondary to IgG4-related sclerosing disease. Histologic features of involved lymph nodes included interfollicular immunoblasts and plasma cells, similar to Castleman’s disease. The percentage of IgG4-/IgG-positive plasma cells in the three patients was markedly elevated (30, 50, and 60%). Administration of prednisolone led to remission in every case. One of three cases was consulted to our hospital due to suspected diagnosis of angioimmunoblastic T cell lymphoma (AITL). The case demonstrates many clinical and pathologic similarities between IgG4-related sclerosing disease and AITL. Pathological similarities between AITL and the lymphoplasmacytic subtype of IgG4-sclerosing disease have recently been reported. It is important to accurately diagnose IgG4-related lymphadenopathy given its ready response to steroid therapy and the potential for misdiagnosing lymphoma on clinical grounds.