Masaru Kojima

Summary

Affiliation: Gunma Cancer Center Hospital
Country: Japan

Publications

  1. pmc Marginal zone B-cell lymphoma arising from buccal mucosa resembling inflammatory myofibroblastic tumor of the soft tissue
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1 Takabayashinishi cho, Ohta, Japan
    Head Neck Pathol 2:218-21. 2008
  2. ncbi Epstein-Barr virus-related reactive lymphoproliferative disorders in middle-aged or elderly patients presenting with atypical features. A clinicopathological study of six cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho Ohta 373 8550, Japan
    Pathol Res Pract 203:587-91. 2007
  3. ncbi Histological diversity of reactive and atypical proliferative lymph node lesions in systemic lupus erythematosus patients
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 203:423-31. 2007
  4. ncbi Follicular lymphoma with prominent sclerosis ("sclerosing variant of follicular lymphoma") exhibiting a mesenteric bulky mass resembling inflammatory pseudotumor. Report of three cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center, Hospital, Ohta 373 8550, Japan
    Pathol Oncol Res 13:74-7. 2007
  5. ncbi Immunohistological findings of suppurative granulomas of Yersinia enterocolitica appendicitis: a report of two cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, Ohta 373 8550, Japan
    Pathol Res Pract 203:115-9. 2007
  6. ncbi Benign, atypical and malignant lymphoproliferative disorders in rheumatoid arthritis patients
    M Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, 373 8550 Ohta, Japan
    Biomed Pharmacother 60:663-72. 2006
  7. ncbi Clinical implications of nodal marginal zone B-cell lymphoma among Japanese: study of 65 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Cancer Sci 98:44-9. 2007
  8. ncbi Incidental Langerhans cell histiocytosis of the parotid gland resembling marginal zone B-cell lymphoma: a case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    J Oral Pathol Med 35:630-2. 2006
  9. ncbi Florid monocytoid B-cell hyperplasia resembling nodal marginal zone B-cell lymphoma of mucosa associated lymphoid tissue type. A histological and immunohistochemical study of four cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 202:877-82. 2006
  10. ncbi Histological variety of floral variant of follicular lymphoma
    Masaru Kojima
    Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1 Takabayashinishi cho, Ohta 373 8550, Japan
    APMIS 114:626-32. 2006

Detail Information

Publications77

  1. pmc Marginal zone B-cell lymphoma arising from buccal mucosa resembling inflammatory myofibroblastic tumor of the soft tissue
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1 Takabayashinishi cho, Ohta, Japan
    Head Neck Pathol 2:218-21. 2008
    ..However, the present case indicated that MZBL should be added to the differential diagnosis of IMT of the soft tissue...
  2. ncbi Epstein-Barr virus-related reactive lymphoproliferative disorders in middle-aged or elderly patients presenting with atypical features. A clinicopathological study of six cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho Ohta 373 8550, Japan
    Pathol Res Pract 203:587-91. 2007
    ....
  3. ncbi Histological diversity of reactive and atypical proliferative lymph node lesions in systemic lupus erythematosus patients
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 203:423-31. 2007
    ....
  4. ncbi Follicular lymphoma with prominent sclerosis ("sclerosing variant of follicular lymphoma") exhibiting a mesenteric bulky mass resembling inflammatory pseudotumor. Report of three cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center, Hospital, Ohta 373 8550, Japan
    Pathol Oncol Res 13:74-7. 2007
    ..The present three cases indicate that the sclerosing variant of grade 1 FL should be added to the differential diagnosis from IPT of the lymph node...
  5. ncbi Immunohistological findings of suppurative granulomas of Yersinia enterocolitica appendicitis: a report of two cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, Ohta 373 8550, Japan
    Pathol Res Pract 203:115-9. 2007
    ..ent. were B-cell negative granulomas, and it demonstrates histopathologic and immunohistochemical findings different from those of cat scratch disease and lymphogranuloma venerum, which contain numerous monocytoid B-cells...
  6. ncbi Benign, atypical and malignant lymphoproliferative disorders in rheumatoid arthritis patients
    M Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, 373 8550 Ohta, Japan
    Biomed Pharmacother 60:663-72. 2006
    ..It is unlikely that EBV is the causative agent of either reactive or atypical LPD. Among malignant lymphomas, EBV-associated lymphoma comprised only a small fraction of all NHLs in the general RA patient population...
  7. ncbi Clinical implications of nodal marginal zone B-cell lymphoma among Japanese: study of 65 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Cancer Sci 98:44-9. 2007
    ..DLBCL + MALT type exhibited significantly poorer 5-year overall survival than the splenic variant. The recognition of DLBCL + MALT type appears important. No API2-MALT1 fusion transcript was detected in any of the 14 cases examined...
  8. ncbi Incidental Langerhans cell histiocytosis of the parotid gland resembling marginal zone B-cell lymphoma: a case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    J Oral Pathol Med 35:630-2. 2006
    ..The present case indicates that LCHs should be added to the different diagnosis for marginal zone B-cell lymphoma of mucosa-associated lymphoid tissue type involving the salivary glands...
  9. ncbi Florid monocytoid B-cell hyperplasia resembling nodal marginal zone B-cell lymphoma of mucosa associated lymphoid tissue type. A histological and immunohistochemical study of four cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 202:877-82. 2006
    ..Recognition of this unusual MBC hyperplasia in reactive lymph node lesions is important to avoid confusion with NMZBLs...
  10. ncbi Histological variety of floral variant of follicular lymphoma
    Masaru Kojima
    Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1 Takabayashinishi cho, Ohta 373 8550, Japan
    APMIS 114:626-32. 2006
    ..The germinal center B-cell nature of FVFL is most clearly recognizable by immunohistochemistry, though histological appearance alone may cause some diagnostic problems...
  11. ncbi Methtrexate-associated lymphoproliferative disorders. A clinicopathological study of 13 Japanese cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 202:679-85. 2006
    ..The present study suggests that EBV- associated non-Hodgkin lymphomas comprise only a portion of all non-Hodgkin lymphomas among MTX-associated LPDs...
  12. ncbi Histological varieties of Epstein-Barr virus-related lymph node lesion resembling autoimmune disease-like clinicopathological findings in middle-aged and elderly patients: a study of six cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 202:609-15. 2006
    ....
  13. ncbi Marginal zone B-cell lymphoma of minor salivary gland representing tumor-forming amyloidosis of the oral cavity. A case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    J Oral Pathol Med 35:314-6. 2006
    ..The present case indicates that primary minor salivary gland MALT-type lymphoma appears to be the cause of tumor-forming amyloidosis of the upper aerodigestive tract including the larynx...
  14. ncbi Plasmacytoid monocytes in cat scratch disease with special reference to the histological diversity of suppurative lesions
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 202:17-22. 2006
    ..Moreover, the association with MBCs and PMOs indicates a functional relationship of MBCs with PMOs in the formation of suppurative lesions in CSD...
  15. ncbi Atypical lymphoplasmacytic and immunoblastic proliferation from rheumatoid arthritis: a case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta 373 8550, Japan
    Pathol Res Pract 202:51-4. 2006
    ..Moreover, there was no history of MTX therapy in the present case, indicating that MTX-induced, LPD-like ALPIB may occur even in the RA patients not treated with MTX therapy...
  16. ncbi Localized lymphoid hyperplasia of the rectum resembling polypoid mucosa-associated lymphoid tissue lymphoma: a report of three cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta 373 8550, Japan
    Pathol Res Pract 201:757-61. 2005
    ..The present cases indicated that benign lymphoid hyperplasia of the rectum should be included in the differential diagnosis for polypoid MALT-type lymphoma of the rectum...
  17. ncbi Primary salivary gland lymphoma among Japanese: A clinicopathological study of 30 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Leuk Lymphoma 48:1793-8. 2007
    ..When appropriate therapy for histologic subtype is used, outcome of the primary salivary gland B-cell lymphoma appears excellent whether histologically indolent or aggressive...
  18. ncbi Bone marrow plasmacytosis in idiopathic plasmacytic lymphadenopathy with polyclonal hyperimmunoglobulinemia: a report of four cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 203:789-94. 2007
    ..Moreover, the immunohistochemical study revealed a polytypic nature of the plasma cells. To avoid overdiagnosis and overtreatment, it is important to be aware of the bone marrow findings of IPL...
  19. ncbi Histopathological variation of primary mucosa-associated lymphoid tissue lymphoma of the oral cavity
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, 373 8550, Japan
    Pathol Oncol Res 13:345-9. 2007
    ..There were no Epstein-Barr virus-encoded small RNA-positive cells detected by in situ hybridization. API2-MALT1 fusion transcript does not appear to be associated with either histological variant of primary intraoral MALT lymphoma...
  20. pmc Incidental MALT type lymphoma exhibiting prominent plasma cell differentiation associated with Hashimoto's thyroiditis. A two case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, Ohta, 373 8550, Japan
    Head Neck Pathol 3:27-30. 2009
    ..Other small B-cell lymphomas, plasmacytoma and plasmablastic lymphoma were excluded using stains for CD5, CD10, CD23, CD43, CD56. Cyclin D1, human herpes virus type-8...
  21. doi IgG4-related disorder of the retroperitoneum resembling Castleman's disease plasma cell type: a report of 2 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 19:220-4. 2011
    ..The serum interleukin-6 level was within the normal range in one case that was examined. From a therapeutic perspective, it is important to discriminate IgG4-related disorder from plasma cell type of Castleman's disease...
  22. ncbi HIV-unrelated benign lymphoepithelial cyst of the parotid glands containing lymphoepithelial lesion--like structures: a report of 3 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Takbayashinishi cho, Ohta, Japan
    Int J Surg Pathol 17:421-5. 2009
    ..The 3 cases indicate that HIV-unrelated BLC should be added to the differential diagnosis of MALT-type lymphoma involving the parotid glands...
  23. ncbi EBV(+) B-cell lymphoproliferative disorder associated with subsequent development of Burkitt lymphoma in a patient with idiopathic CD4(+) T-lymphocytopenia
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    J Clin Exp Hematop 48:55-9. 2008
    ..The present case did not associate with severe opportunistic infections during the course of disease. EBV(+) BL may be the first manifestation of severe immunodeficiency of the ICL in this patient...
  24. ncbi "Follicular variant" of hyaline-vascular type of Castleman's disease: histopathological and immunohistochemical study of 11 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    J Clin Exp Hematop 48:39-45. 2008
    ..Recognition of the histological and immunohistochemical findings of the FV of HVCD is needed to avoid overdiagnosis...
  25. doi MALT type lymphoma demonstrating prominent plasma cell differentiation resembling fibrous variant of Hashimoto's thyroiditis: a three case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, Ohta 373 8550, Japan
    Pathol Oncol Res 15:285-9. 2009
    ..To avoid underdiagnosis, we emphasize that careful attention should be paid to these immunological features as well as to morphological findings...
  26. ncbi B-cell cutaneous lymphoid hyperplasia representing progressive transformation of germinal center: a report of 2 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 18:429-32. 2010
    ..To avoid overdiagnosis and overtreatment, immunophenotypic and genotypic studies are required along with careful morphologic examination...
  27. doi Tonsillar lesions of infectious mononucleosis resembling MALT type lymphoma. A report of two cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, Ohta, Japan
    Pathol Oncol Res 14:489-92. 2008
    ..The present two cases indicated that acute IM should be added to the differential diagnosis for MALT type lymphoma in young adults...
  28. ncbi Lymphoplasmacytic infiltrate of regional lymph nodes in Kuttner's tumor (chronic sclerosing sialadenitis): a report of 3 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Center Hospital, Ohta, Japan
    Int J Surg Pathol 16:263-8. 2008
    ....
  29. doi Clinical implications of idiopathic multicentric castleman disease among Japanese: a report of 28 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 16:391-8. 2008
    ..Compared with idiopathic multicentric Castleman disease in Western countries, the chronic course of the disease of idiopathic multicentric Castleman disease in Japan appears to be related to negativity for human herpesvirus 8 infection...
  30. doi Marginal zone B-Cell lymphoma among primary B-Cell lymphoma of Waldeyer's ring: histopathologic and immunohistochemical study of 16 tonsillectomy specimens
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 16:164-70. 2008
    ....
  31. doi Focal lymphoid hyperplasia of the terminal ileum presenting mantle zone hyperplasia with clear cytoplasm. A report of three cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Oncol Res 14:337-40. 2008
    ..To avoid overdiagnosis and overtreatment, it is suggested that immunophenotypic and genotypic studies might be required, and careful attention should be paid to the morphologic examination...
  32. doi Plasmacytic hyperplasia in age-related Epstein-Barr virus-associated lymphoproliferative disorders: a report of two cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, Ohta 373 8550, Japan
    Pathol Res Pract 204:267-72. 2008
    ..These two cases demonstrated the presence of plasmacytic hyperplasia in age-related EBV+B-cell LPDs, and plasmacytic hyperplasia also appears to be the earliest lesion of age-related EBV+B-cell LPDs...
  33. doi Localized lymphoid hyperplasia of the rectum representing progressive transformation of the germinal center. A report of two cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    APMIS 115:1432-6. 2007
    ..However, reactivity of lymphoid cells for EBV has been reported in lymphoid tissues in a high percentage of "normal" individuals. The etiology of BLH of the rectum remains unclear...
  34. doi Pulmonary lesion of idiopathic plasmacytic lymphadenopathy with polyclonal hyperimmunoglobulinemia appears to be a cause of lymphoplasmacytic proliferation of the lung: a report of five cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, Ohta 373 8550, Japan
    Pathol Res Pract 204:185-90. 2008
    ....
  35. ncbi Floral variant of follicular lymphoma containing marginal zone B-cell component. Report of two cases
    M Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    APMIS 113:638-42. 2005
    ..In diagnostic practice, the differential diagnosis between the floral variant of follicular lymphoma containing marginal zone B-cells and the "floral variant" of NMZBL is important...
  36. ncbi Atypical lymphoplasmacytic and immunoblastic proliferation from systemic lupus erythematosus. A case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, Ohta 373 8550, Japan
    Pathol Res Pract 201:531-5. 2005
    ..As previously suggested, the present case indicates that a clinical correlation as well as immunohistologic and genotypic studies may be necessary to discriminate between ALPIBPs and AILT...
  37. ncbi Granulocytic sarcoma presenting with lymph node infarction at disease onset
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    APMIS 111:1133-6. 2003
    ..Differentiation of granulocytic sarcoma from malignant lymphomas is important for adequate therapy. The present cases indicate that granulocytic sarcoma should be added to the list of differential diagnoses for lymph node infarction...
  38. ncbi Hepatic angiomyolipoma resembling an inflammatory pseudotumor of the liver. A case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1 Takabayashinishi cho, Ohta 373 8550, Japan
    Pathol Res Pract 200:713-6. 2004
    ..HMB45 immunostaining confirmed the diagnosis of AML. The present case indicates that IPT or IPT-like FDC tumor should be added to the list of differential diagnoses for AML of the liver...
  39. ncbi Epstein-Barr virus-related lymph node lesion resembling autoimmune disease-like clinicopathological findings in elderly patients. Report of three cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    APMIS 111:1083-8. 2003
    ....
  40. ncbi Lymph node lesion in infectious mononucleosis showing geographic necrosis containing cytologically atypically B-cells. A case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, Ohta 373 8550, Japan
    Pathol Res Pract 200:53-7. 2004
    ....
  41. ncbi Nodal marginal zone B-cell lymphoma resembling plasmacytoma arising from a plasma cell variant of localized Castleman's disease: a case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    APMIS 110:523-7. 2002
    ..When monoclonal plasma cell infiltration is observed in PCLCD, the light chains are mostly restricted to the lambda chain. This case suggests that some plasma cell-containing tumors arising from PCLCD may represent a variant of NMZBL...
  42. ncbi Autoimmune disease-associated lymphadenopathy from dermatomyositis. A case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 199:691-4. 2003
    ..However, Epstein-Barr virus-encoded small RNA-positive cells were not identified by in situ hybridization. Moreover, the patient had no history of methotrexate therapy...
  43. ncbi Massive hyperplasia of marginal zone B-cells with clear cytoplasm in the lymph node: a case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 199:625-8. 2003
    ..This unusual marginal zone B-cell hyperplasia should be differentiated from low-grade B cell lymphomas, and particularly from nodal marginal zone B-cell lymphomas...
  44. ncbi Classical Hodgkin lymphoma occurring in clusters of nodal marginal zone B-lymphocytes in association with progressive transformation of germinal center. A case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 199:547-50. 2003
    ..An occasional association between MZBLs clusters and PTGC has been reported previously. This case suggests that classical Hodgkin lymphoma should be added to the differential diagnosis of PTGC...
  45. ncbi Riedel's thyroiditis containing cytologically atypically appearing B-cells: a case report
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 199:497-501. 2003
    ..The polyclonal nature of B-cells was demonstrated immunohistochemically and by polymerase chain reaction in both the thyroid gland and the lymph node lesion...
  46. ncbi Primary marginal zone B-cell lymphoma of the lymph node resembling plasmacytoma arising from a plasma cell variant of Castleman's disease. A clinicopathological and immunohistochemical study of seven patients
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    APMIS 110:875-80. 2002
    ..Moreover, the presence of surface IgM+, IgD- and CD27+ CCL- cells suggests that these tumors are derived from memory B-lymphocytes...
  47. ncbi Cellular composition of subacute thyroiditis. an immunohistochemical study of six cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 198:833-7. 2002
    ..Neither human herpes virus 8 nor EBER-positive cells were detected in the six patients. The findings of our study suggest that cellular immune response may play an important role in the pathogenesis of subacute thyroiditis...
  48. ncbi Lymphoid variant of hyaline vascular Castleman's disease containing numerous mantle zone lymphocytes with clear cytoplasm
    Masaru Kojima
    Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    APMIS 113:75-80. 2005
    ..To avoid overdiagnosis and overtreatment, it is suggested that immunophenotypic and genotypic studies might be required, and furthermore careful attention should be paid to the morphologic examination...
  49. ncbi Reactive hyperplasia with giant follicles in lymph node lesions from systemic lupus erythematosus patients. Report of three cases
    M Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1 Takabayashinishi cho, Ohta, Japan
    APMIS 113:558-63. 2005
    ..The authors would like to stress that the RHGF which is described in the present study should be listed in the pathohistology of SLE lymphadenopathy...
  50. ncbi Progressive transformation of germinal center presenting with histological features of hyaline-vascular type of Castleman's disease
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    APMIS 113:288-95. 2005
    ..The PTGC with coexistent HV type of CD may represent a certain form of reactive follicular hyperplasia. The possibility of PTGC should be considered and excluded before diagnosing CD...
  51. ncbi Idiopathic multicentric Castleman's disease. A clinicopathologic and immunohistochemical study of five cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Pathol Res Pract 201:325-32. 2005
    ..Few CD57-positive T-cells were observed in the hyaline-vascular and epithelioid follicles. The lack of CD57-positive T-cells appears to be related to the formation of abnormal germinal centers in the MCD...
  52. ncbi Follicular lymphoid hyperplasia of the oral cavity representing progressive transformation of germinal center
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta 373 8550, Japan
    APMIS 113:221-4. 2005
    ..Although the etiology of FLH of the oral cavity remains unclear, the present case suggests that a subset of FLH of the oral cavity appears to be an EBV-associated lymphoproliferative disorder...
  53. ncbi Usefulness of immunohistochemistry for recognizing metastatic colorectal adenocarcinoma in infarcted lymph nodes
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1, Takabayashinishi cho, Ohta 373 8550, Japan
    Pathol Res Pract 200:771-4. 2005
    ..Using formalin-fixed and paraffin-embedded tissues, immunostaining for cytokeratins and CEA of the lymph node containing necrotic carcinoma may provide clinically valuable information...
  54. ncbi Malignant lymphoma in patients with systemic rheumatic disease (rheumatoid arthritis, systemic lupus erythematosus, systemic sclerosis, and dermatomyositis): a clinicopathologic study of 24 Japanese cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Dokkyo University School of Medicine, Mibu, Japan
    Int J Surg Pathol 14:43-8. 2006
    ..Our findings suggested EBV-associated lymphoma comprised only a small fraction of all non-Hodgkin's lymphomas in the general SRD patient population...
  55. ncbi 5-Fluorouracil-related gene expression in primary sites and hepatic metastases of colorectal carcinomas
    Shinichi Sameshima
    Department of Surgery, Gunma Cancer Center, 617 1 Takabayashi nishi, Ota, Gunma 373 8550, Japan
    Anticancer Res 28:1477-81. 2008
    ..The aim of this study was to investigate the correlation of the mRNA expressions of 5-fluorouracil (5FU)-related genes in the primary sites and liver metastases of colorectal carcinomas...
  56. ncbi Distribution of Epstein-Barr virus in systemic rheumatic disease (rheumatoid arthritis, systemic lupus erythematosus, dermatomyositis) with associated lymphadenopathy: a study of 49 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1 Takabayashinishi cho, Ohta, Japan
    Int J Surg Pathol 13:273-8. 2005
    ..Our study indicates that the underlying immune deficits of patients with SRDs may also play an important role in the development of EBV-associated LPDs in SRDs, as previously suggested by several authors...
  57. ncbi Clinical implication of idiopathic plasmacytic lymphadenopathy with polyclonal hypergammaglobulinemia: a report of 16 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 12:25-30. 2004
    ..The overall clinicopathologic and immunohistochemical findings of our 16 cases suggest that IPL is distinct from MCD reported in Western countries...
  58. ncbi Progressive transformation of germinal centers: a clinicopathological study of 42 Japanese patients
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 11:101-7. 2003
    ..Moreover, in Japan, PTGC is thought to be involved in the etiology of florid reactive follicular hyperplasia in elderly patients...
  59. ncbi Follicular colonization of nodal marginal-zone B-cell lymphoma resembling follicular lymphoma: report of 6 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 13:73-8. 2005
    ..The marginal-zone nature is most recognizable on immunohistochemistry, although the histologic appearance alone may cause some diagnostic problems. It is important for pathologists to consider this type of lesion in diagnostic practice...
  60. ncbi Clinical implication of florid reactive follicular hyperplasia in Japanese patients 60 years or older: a study of 46 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 13:175-80. 2005
    ..By in situ hybridization, Epstein-Barr virus genomes were demonstrated in only 6 (15%) of 39 cases examined...
  61. ncbi Reactive lymphoid hyperplasia of the lymph nodes with giant follicles: a clinicopathologic study of 14 Japanese cases, with special reference to Epstein-Barr virus infection
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, 617 1 Takabayashinishi cho, Ohta, Japan
    Int J Surg Pathol 13:267-72. 2005
    ..The present study indicates that a portion of RHGF appears to represent a histologic finding of acute IM. Moreover, as previously stated, RHGF should be differentiated from follicular lymphoma, particularly the floral variant...
  62. ncbi Sclerosing variant of follicular lymphoma arising from submandibular glands and resembling "Küttner tumor": a report of 3 patients
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 11:303-7. 2003
    ..This study indicates that this sclerosing variant of follicular lymphoma should be added to the list of different diagnoses for "Küttner tumor."..
  63. ncbi Centroblastic and centroblastic/centrocytic lymphoma associated with a prominent epithelioid granulomatous response: a clinicopathologic study of 50 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Mod Pathol 15:750-8. 2002
    ..The centroblastic and centroblastic/centrocytic lymphoma with an epithelioid cell response may be regarded as the morphologic variant of DLBCL preferentially arising in the aged population and reflecting the disease progression of FL...
  64. ncbi Lymph node infarction associated with infectious mononucleosis: report of a case resembling lymph node infarction associated with malignant lymphoma
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 10:223-6. 2002
    ..The patient was free from disease after 50 months' follow-up...
  65. ncbi Lymph node lesion in adult-onset Still's disease resembling peripheral T-cell lymphoma: a report of three cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Takabayashinishi cho Ohta, Japan
    Int J Surg Pathol 10:197-202. 2002
    ..Although AOSD appears to be a rare systemic inflammatory disorder, the lymph node lesion should be added to the differential consideration of benign lymph node lesions simulating node-based peripheral T-cell lymphoma...
  66. ncbi Kuttner's tumor of salivary glands resembling marginal zone B-cell lymphoma of the MALT type: a histopathologic and immunohistochemical study of 7 cases
    Masaru Kojima
    Department of Pathology and Clinical Laboratories, Gunma Cancer Center Hospital, Ohta, Japan
    Int J Surg Pathol 12:389-93. 2004
    ..However, immunohistological study demonstrated the mixed nature of the cells resembling centrocyte-like cells. Moreover, the polytypic nature of B lymphocytes was demonstrated by immunohistochemistry and polymerase chain reaction...
  67. ncbi Morphological spectrum of cyclin D1-positive mantle cell lymphoma: study of 168 cases
    Y Yatabe
    Department of Pathology and Clinical Laboratories, Aichi Cancer Center Hospital, Nagoya, Japan
    Pathol Int 51:747-61. 2001
    ..MCL can be diagnosed with the application of cyclin D1 immunostaining, if careful attention is given to architectural and cytological features...
  68. ncbi Follicular hyperplasia presenting with a marginal zone pattern in a reactive lymph node lesion
    Masaru Kojima
    Department of Anatomic and Diagnostic Pathology, Dokkyo University School of Medicine, Mibu, Japan
    APMIS 110:325-31. 2002
    ..Recognition of unusual marginal zone hyperplasia in reactive lymph node lesions is important to avoid confusion with nodal involvement in various low-grade B cell lymphomas presenting a marginal zone distribution pattern...
  69. ncbi Diffuse nodular lymphoid hyperplasia of the large bowel without hypogammaglobulinemia or malabsorption syndrome: a case report and literature review
    Shigeki Tomita
    Department of Surgical and Molecular Pathology, Dokkyo University School of Medicine, Mibu, Tochigi, Japan
    Int J Surg Pathol 10:297-302. 2002
    ..The present case appears to be an essentially benign condition bearing a resemblance, both clinically and histologically, to malignant lymphoma, and from which it can be distinguished by use of immunohistochemical or molecular analysis...
  70. ncbi Senile EBV+ B-cell lymphoproliferative disorders: a clinicopathologic study of 22 patients
    Takashi Oyama
    Department of Hematology and Chemotherapy, Aichi Cancer Center, Nagoya, Japan
    Am J Surg Pathol 27:16-26. 2003
    ..Further investigations are needed to clarify the pathogenesis of this disease and to determine the optimal treatment strategy...
  71. ncbi Reactive lymphoid hyperplasia with giant follicles associated with post-therapeutic state of hematological malignancies: a report of six cases
    Masaru Kojima
    Leuk Lymphoma 47:1404-6. 2006
  72. ncbi Küttner's tumor of the submandibular glands: report of five cases with fine-needle aspiration cytology
    Sadayuki Kaba
    Department of Laboratory Science, School of Health Sciences, Faculty of Medicine, Gunma University, Shouwa machi, Maebashi, Gunma, Japan
    Diagn Cytopathol 34:631-5. 2006
    ..However, a portion of cytological specimens of KT containing relatively large numbers of lymphoid cells should be differentiated from malignant lymphoma arising from the submandibular gland...
  73. doi Methotrexate-associated lymphoproliferative disorder arising in a patient with adult Still's disease
    Akio Tanaka
    Division of Pathology, Department of Diagnostic and Therapeutic Sciences, Meikai University School of Dentistry, Sakado, Saitama, Japan
    J Oral Maxillofac Surg 66:1492-5. 2008
  74. ncbi Atypical lymphocytosis resembling non-Hodgkin's lymphoma in peritoneal effusion of infectious mononucleosis: a case report
    Seiji Tsuruta
    Department of Clinical Laboratories, Isesaki Municipal Hospital, 12 1, Tsunatorihonmachi 372 0817, Isesaki, Japan
    Pathol Res Pract 200:47-51. 2004
    ..The present case indicates that IM should be added to the list of lesions considered for the differential diagnosis of non-Hodgkin's lymphoma of the peritoneal fluid, particularly regarding young adults...
  75. ncbi Phenotypic analysis of peripheral T/NK cell lymphoma: study of 408 Japanese cases with special reference to their anatomical sites
    Koichi Ichimura
    Department of Pathology and Molecular Diagnostics, Aichi Cancer Center, Nagoya, Japan
    Pathol Int 53:333-44. 2003
    ..This concept might provide a new insight enabling further understanding of the interrelationships among WHO T/NK-cell disease entities...
  76. doi IgG4-positive plasma cells in inflammatory abdominal aortic aneurysm: the possibility of an aortic manifestation of IgG4-related sclerosing disease
    Noriyuki Sakata
    Department of Pathology, School of Medicine, Fukuoka University, Japan
    Am J Surg Pathol 32:553-9. 2008
    ..These findings suggest that IAA may be an aortic lesion reflecting the presence of IgG4-related sclerosing disease, and not a simple inflammatory aneurysm of the aorta...
  77. ncbi Expression of BAFF-R (BR 3) in normal and neoplastic lymphoid tissues characterized with a newly developed monoclonal antibody
    Naoya Nakamura
    Department of Pathology, Fukushima Medical University, Hikarigaoka 1, Fukushima shi 960 1295, Japan
    Virchows Arch 447:53-60. 2005
    ..Thus, the mAb is very useful for further understanding of both healthy B-cell biology and its pathogenic neoplasms...