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Reactive lymphoid hyperplasia of the liver:A case report and review of literature

World Journal of Gastroenterology 2007年第40期13卷 5403-5407页

作者： Takuro Machida Toshiyuki Takahashi Tomoo Itoh Michiaki Hirayama Takayuki Morita Shoichi Horita Department of Internal Medicine Hokkaido Gastroenterology HospitalSapporoHokkaido 065-0041Japan Department of Pathology Hokkaido Gastroenterology HospitalSapporoHokkaido 065-0041Japan Department of Pathology Hokkaido University HospitalSapporoHokkaido060-8648Japan Department of Surgery Hokkaido Gastroenterology HospitalSapporoHokkaido 065-0041Japan

A case of a 53-year-old female patient with reactive lymphoid hyperplasia （RLH）, clinically designated as pseudolymphoma of the liver is described in this article. The patient was admitted to our hospital for further evaluation of hepatic tumors incidentally discovered at another hospital. Various diagnostic methods, including ultrasonography （US）, computerized tomography （CT）, magnetic resonance imaging （MRI） and hepatic angiography displayed three small lesions in the liver with outstanding findings consistent with hepatocellular carcinoma （HCC）. Surgical resection was performed and the three lesions were microscopically diagnosed as RLH of the liver. The lesions comprised a massive infiltration of lymphoid cells with follicles and hyalinized inter- follicular spaces. Immunohistochemical examination revealed that infiltrating lymphocytes had no prominent nuclear atypia and polyclonality. RLH of the liver is a very rare condition and only twelve cases have been reported in the English literature. Majority of the reported cases were middle-aged women and about half of them had some immunologic abnormalities such as autoimmune thyroiditis, Sjogren＇s syndrome, primary immunodeficiency, primary biliary cirrhosis. Since they are olden clinically misdiagnosed as HCC, surgery is the choice of treatment for these patients. Although their pathology resembles malignant lymphoma, the clinical course is completely benign. The authors propose that RLH of the liver can be discriminated from HCC by its clinical features.

关键词： Reactive lymphoid hyperplasia Pseudo lymphoma Hepatocellular carcinoma autoimmunethyroiditis Immunohistochemistry

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