title: Primary hepatic marginal zone B-cell lymphoma with mantle cell lymphoma phenotype.
abstract: We report a rare case of primary hepatic lymphoma, Stage II disease, in a 48-year-old male who had a solitary hepatic tumour measuring 4 x 4.5 x 3 cm. The tumour showed a nodular growth pattern and lymphoepithelial lesions with bile ducts. Some neoplastic nodules had a non-neoplastic atrophic germinal centre and/or a thin mantle cell layer. Morphologically, the neoplastic cells were centrocyte-like cells or intermediate lymphocytes. They expressed L26(CD20)+/LN-1(CDw75)+/-/LN-2(CD74)+/cyclin D1- and had a monotypic immunoglobulin of cytoplasmic IgM (kappa) on paraffin sections. The neoplastic cells or neoplastic nodules expressed surface IgM+/surface IgD+/-/Leu-1(CD5)+/DRC-1+/alkaline phosphatase+/B1(CD20)+/B4(CD19)- on fresh frozen sections. We therefore diagnosed this case as primary hepatic marginal zone B-cell lymphoma with mantle cell lymphoma phenotype. We confirm that it is difficult to differentiate extranodal marginal zone B-cell lymphoma (low grade B-cell lymphoma of mucosa-associated lymphoid tissue type; MALT lymphoma) and mantle cell lymphoma.
authors.affiliation: Department of Pathology, Juntendo University School of Medicine, Tokyo, Japan.
authors.forename: G
authors.initials: G
authors.lastname: Ueda
authors.forename: K
authors.initials: K
authors.lastname: Oka
authors.forename: T
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Y
authors.initials: Y
authors.lastname: Yatabe
authors.forename: K
authors.initials: K
authors.lastname: Yamanaka
authors.forename: M
authors.initials: M
authors.lastname: Suyama
authors.forename: J
authors.initials: J
authors.lastname: Ariyama
authors.forename: S
authors.initials: S
authors.lastname: Futagawa
authors.forename: N
authors.initials: N
authors.lastname: Mori
mesh_terms: D001707:Biopsy, Needle; D006801:Humans; D007075:Immunoglobulin M / Q000032:analysis; D007145:Immunoglobulin kappa-Chains / Q000032:analysis; D007150:Immunohistochemistry; D016130:Immunophenotyping; D008113:Liver Neoplasms / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D008228:Lymphoma, Non-Hodgkin / Q000188:drug therapy / Q000473:pathology* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D010641:Phenotype
chemical_list: D007075:Immunoglobulin M; D007145:Immunoglobulin kappa-Chains