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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 23 (1993), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: To analyse the cytological features of benign monocytoid B-cells, we investigated, histologically and immunohisto-chemically, 78 reactive lymphadenopathies expressing monocytoid B-cell reactions. Within a broad cytological spectrum of reactive monocytoid B-cells, two cytological types can be recognized: 1 the common type composed of medium-sized cells with irregular or bean-shaped nuclei and inconspicuous nucleoli, and 2 the large cell type composed of cells considered to represent large transformed monocytoid B-cells, with less pleomorphic round nuclei with vesicular chromatin and moderately basophilic, prominent nucleoli. In between these variants transitional forms showing evolution to large transformed monocytoid B-cells occurred. While monocytoid B-cell reactions in 70.5% of all cases were composed predominantly of the common type of monocytoid B-cells, in 29.5% of cases the large transformed cells prevailed. The two distinctive cytological types of reactive monocytoid B-cells, seem to have their neoplastic counterparts in monocytoid B-cell lymphoma, including its large cell variant.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 12 (1988), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A variant of lymphadenitis mimicking interfollicular Hodgkin's disease is described. The morphology, immunohistochemistry and clinical course of 25 cases are reported. The morphology is characterized by changes in the interfollicular region within a well-preserved lymph node architecture. These changes include variegated hyperplasia of the pulp with epithelioid cells, mature eosinophilic granulocytes and immunoblasts occasionally resembling Hodgkin cells. In contrast to Hodgkin's disease no typical Sternberg-Reed cells could be found. Immunohistochemically, neither positive reactions with Hodgkin cell markers (anti-CD15: LeuM1; 3C4; C3D-1) nor B-cell monoclonality could be detected. Transition to malignancy, in particular Hodgkin's disease, did not occur in our cases.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aims:  To carry out an immunohistochemical study on bone marrow (BM) biopsy specimens in 75 patients with chronic myelogenous leukaemia (CML) on long-term STI571 therapy.Methods and results:  Sequential BM specimens taken at intervals of 21 ± 6 months were investigated by enzyme- and immunohistochemistry including proliferating cell nuclear antigen and apoptosis. Evaluation was performed either by semiquantitative scoring or by morphometry (CD61+ megakaryopoiesis). In 41 patients with chronic phase CML, treatment resulted in a significant decrease in cellularity and neutrophil granulopoiesis contrasting with an accumulation of erythroid precursor cells. Morphometry showed a reduction of abnormal micromegakaryocytes consistent with normalization. Regression of myelofibrosis was identified in eight of 15 patients, whereas progression occurred in 17 patients; mostly in those with acceleration and blastic crisis. The increased post-treatment incidence of reactive lymphoid nodules was remarkable. Myeloblasts, CD34+ progenitors and immature myelomonocytic cells initially decreased, but recurred in 14 patients who later developed a relapse. STI571 exerted an inhibitory effect on cell proliferation associated with enhanced apoptosis in responding patients.Conclusion:  Long-term treatment with STI571 exerts pronounced changes on BM histopathology that not only involve haematopoiesis and stromal constituents, but also proliferation and apoptosis.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 14 (1989), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Castleman's disease of the plasma cell variant observed in 21 patients was investigated morphologically and by immunohistochemistry. The male to female ratio was 2.5:1. The age ranged from 18 to 71 years (mean age 47.6 years). Histologically, the lesions were characterized by numerous, evenly distributed germinal centres ranging from large hyperplastic to small hyaline-vascular types with moderate to extensive sheets of plasma cells in between. In all cases with generalized lymph node enlargement dilated sinuses could be found. Immunohistochemical studies demonstrated a polyclonal plasma cell population in 11 of 18 lesions. Seven lesions contained a monoclonal plasma cell population, five with IgG/lambda and two with IgA/lambda; clinically, two of these patients had generalized lymphadenopathy; in none could manifestation of a plasmacytoma be found outside the lymph node lesion: only two of the seven patients exhibited a paraproteinaemia (IgG/lambda and IgA/lambda, respectively) corresponding to the Ig type of the proliferated plasma cells. Six patients with polyclonal lesions had constitutional symptoms such as fever, anaemia, polyclonal hypergamma-globulinaemia; one of these six patients manifested symptoms consistent with a diagnosis of Takatsuki syndrome. The monoclonal plasma cell type of Castleman's disease did not progress to a generalized disease. This monoclonal variant may be a lymph node-based type of benign monoclonal gammopathy.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 16 (1990), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Sixty-two cases of primary malignant lymphoma of the were investigated. Fifty-eight lymphomas were of B- and two of T-cell type. Two cases of high-grade homa could not be further classified. The largest group (43 cases) consisted of low-grade B-cell lymphoma of the bronchus-associated lymphoid tissue. These showed features similar to low-grade B-cell lymphomas of the mucosa-associated lymphoid tissue of the stomach. The low-grade lymphomas showed a peak occurrence in the sixth decade, the high-grade lymphomas in venth decade. Males predominated slightly. Three-quarters of the patients with low-grade B-cell lymphoma of the bronchus-associated lymphoid tissue showed solitary or multiple sharply defined nodules of the lung. The prognosis of the B-cell-derived lung lymphomas without constitutional symptoms was relatively favourable, regardless of whether they were of low- or high-grade malignancy, whereas patients with constitutional symptoms and the two patients with T-cell lymphomas showed a bad prognosis. However, recurrences and metastases in the lung, stomach, lymph nodes and salivary glands were seen in about 46% of the cases of low-grade B-cell lymphoma of the bronchus-associated lymphoid tissue.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Histopathology 15 (1989), S. 0 
    ISSN: 1365-2559
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Twenty cases with a morphological picture highly suspicious for a combination of non-Hodgkin's lymphoma and Hodgkin's disease were investigated. The infiltrates of Hodgkin's disease differed from those of non-Hodgkin's lymphoma in their cellular component of Hodgkin and Sternberg-Reed cells and the irregularity in the fibre pattern. Based upon histological and immunohistochemical criteria the 20 cases were divided into three groups. Group 1 (n = 10) contained seven chronic lymphocytic leukaemias of B type, one lymphoplasmacytoid immunocytoma, and two centroblastic/centrocytic lymphomas. The non-Hodgkin's lymphoma components showed a monotypic immunoglobulin distribution pattern and/or leukaemic blood picture. Adjacent to the non-Hodgkin's lymphoma was typical Hodgkin's disease in which Hodgkin and Sternberg-Reed cells were positive for both immunoglobulin light chains and IgG and reacted with anti-CD15. Group 2 (n = 5) consisted exclusively of centroblastic/centrocytic lymphoma in combination with Hodgkin's disease in which the few Hodgkin and Sternberg-Reed cells were negative with anti-CD15 monoclonal antibody. Group 3 (n = 5) consisted of four chronic lymphocytic leukaemias of B type and one lymphoplasmacytoid immunocytoma. In these cases no combination with Hodgkin's disease could be diagnosed apart from the presence of partially CD15 positive Hodgkin and Sternberg-Reed cells. The following conclusions were drawn: anti-CD15 (LeuM1 and 3C4/C3D-1) can neither confirm nor exclude Hodgkin's disease since, while they do not detect Hodgkin and Sternberg-Reed cells in all cases of Hodgkin's disease, they do recognize Hodgkin and Sternberg-Reed cells in some B-cell lymphomas; anti-CD30 (Ber-H2) reacted with Hodgkin and Sternberg-Reed cells in all cases of Hodgkin's disease and also detected these cells in cases of non-Hodgkin's lymphoma.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0165-4608
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 414 (1989), S. 399-405 
    ISSN: 1432-2307
    Keywords: Malignant lymphoma ; Nasal cavity ; Paranasal sinuses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The incidence of malignant lymphomas in the nasal cavity and paranasal sinuses was found tobe 0.17% of all malignant lymphomas and 0.44% of all extranodal malignant lymphomas registered in the Kiel Lymph Node Registry from 1972 to 1987. Fifty-nine cases of malignant lymphoma presenting in the nasal cavity and paranasal sinuses were investigated with morphological and immunological methods. The median age of the patients was 64.5 years, with a female predominance (m:f=0.87:1). In the 59 cases a marked preponderance of B-cell lymphomas was found (centroblasticn=15, immunoblasticn=8, Burkitt's lymphoman=6, Immunocytoman=3, centrocyticn=1, centroblastic/centrocyticn=1, plasmacyticn=11); only a small number (n=5) was of T-cell lineage (pleomorphic types). Nine further cases could not be assigned with certainty to either the T or B cell system. Angiocentricity with infiltration and destruction of vessel walls by tumour cells was demonstrated only in the T-cell lymphomas; the B-cell lymphomas, in contrast, of ten surrounded and compressed blood vessels with intact endothelium. No similarity to malignant lymphomas of mucosa associated lymphoid tissue, such as those in the gastrointestinal tract, was detected.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-2307
    Keywords: Large cell anaplastic lymphoma ; Electron microscopy ; Immunophenotyping
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Eleven cases of large cell anaplastic lymphoma (T typen=5, B typen=4, 0 typen=2) were investigated using electron microscopy and immunophenotyping on formalin-fixed paraffin sections and frozen sections of fresh tissue, to determine whether morphological criteria exist for the discrimination of T, B, and 0 phenotypes. Tumour cell lineage could not be established from ultrastructural features. On paraffin material monoclonal B-cell markers Ki-B5 and L-26 served as reliable tools for recognizing the B phenotype of large cell anaplastic lymphomas (previously determined on fresh material), whereas monoclonal antibodies MT1 (CD43) and UCHL1 (CD45RO) were of limited value in lineage determination.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 413 (1988), S. 269-274 
    ISSN: 1432-2307
    Keywords: High-grade malignant B-cell lymphoma ; Primary bone involvement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Five cases of primary high-grade malignant lymphoma of bone are presented. The tumours occurred at a single site in all the cases and produced osteopathic lesions. Histologically, they were large cell tumours characterized by round to irregularly shaped nuclei with finely distributed heterochromatin and small to medium-sized nucleoli. The cytoplasm was moderate and slightly to moderately basophilic. In one case, giant cells similar to Hodgkin and Sternberg-Reed cells occured. The tumour cells bore B-cell markers but did not express immunoglobulin. Three of the bone tumours were polymorphic centroblastic lymphomas. The remaining two cases were also high-grade malignant B-cell lymphomas which may also be derived from germinal center cells but this could not be further substantiated.
    Type of Medium: Electronic Resource
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