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  • 1
    ISSN: 1432-2307
    Keywords: DNA synthesis ; Cell cycle ; Flow cytometry ; Endometrium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary DNA distribution patterns and the fractions of the cell cycle phases were determined by means of flow-through cytometry in 87 samples of normal, atrophic, hyperplastic and carcinomatous human endometrium. The S-phase fractions vary during the normal menstrual cycle between 1 and 3% and reach a periovulatory maximum between 4.4 and 4.7%. Atrophic endometrium and regressive-glandular cystic hyperplasia have little DNA synthesis (1.01% and 1.68% S-phase fractions respectively). Proliferating glandular cystic hyperplasia reveals 3.38% S-phase fraction, whereas adenomatous hyperplasia has an increased number of DNA-synthesizing cells (4.81%). The well-differentiated endometrial carcinoma shows no cytophotometrically detectable differences in comparison to adenomatous hyperplasia. All endometrial samples except for poorly differentiated endometrial carcinoma showed a diploid to tetraploid DNA distribution pattern. The poorly differentiated endometrial carcinoma displays two different types: one rapidly growing diploid-tetraploid tumor with 8.0 to 9.6% S-phase fractions, and another type with stemline deviations, polyploid nuclei and less pronounced synthetic activity.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 396 (1982), S. 213-224 
    ISSN: 1432-2307
    Keywords: B-CLL ; B-immunoblastic lymphoma ; Richter's syndrome ; J chain
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A 66-year old male with Richter's syndrome died 52 month after diagnosis of chronic lymphocytic leukaemia (CLL). The clinical course was characterized by a marked IgM hypoglobulinaemia which paralleled a chronically relapsing Herpes simplex infection. Autopsy showed a large retroperitoneal and intraabdominal tumour mass and well defined supradiaphragmatic lymphomas. Histological examination revealed a composite tumour consisting of CLL B-cell type (B-CLL) and immunoblastic malignant lymphoma of B-cell type (B-IbL). The lymphocytes bear μ-chains on their surface and to a lesser extend within their cytoplasm, the obviously defective immunoblasts produce J chains exclusively. Flow cytophotometric data seem to indicate an identical diploid stem line of the two tumours. The majority of the cells are in G0/1 phase. The CLL rarely produces mitoses, however, the IbL has a mitotic rate of 7% and a considerable proportion (33%) of cells in the phase of DNA-synthesis. This is the fourth malignant lymphoma and the second immunoblastic lymphoma to be reported that produces J chain in the absence of immunoglobulin.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2307
    Keywords: Mediastinal lymphoma ; Clear cell lymphoma ; Immunoglobulin-deficient B cell lymphoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This is a report on 8 mediastinal tumours that occurred in young adults (19–43 years, mean: 29.4); predominantly in females (6/8). Initial symptoms consisted of thoracic pain and venectasia and in only one case in B symptoms. After surgical tumour reduction, radiation and/or chemotherapy, local recurrence was observed in each case under clinical care; abdominal spread is presently suspected in 3 patients; 3 died 11, 13 and 22 months after diagnosis. None developed leukaemia. The tumours are B-cell neoplasms with a characteristic immunophenotype: leucocyte common antigen+, common acute lymphoblastic leukaemia antigen−, B 1-antigen+, surface and cytoplasmic immunoglobulin−. Flow cytometry revealed DNA-diploidy in 7 cases and a moderately (3.2–3.8%) to extremely high (8.0–20.6%) S-phase component. The proliferation associated antigen Ki67 was detectable in 10–60% of the tumour cell nuclei, thus stressing the considerable or rapid growth. Histopathology is characterized by a diffuse growth pattern and a clearness and abundance of cytoplasm of the pleomorphic tumour cells, which vary in size and nuclear morphology from patient to patient. Apoptoses are more numerous than mitoses. Fibrosis and focal necrosis are common, sclerosis is present in 3 cases. We suggest that primary mediastinal lymphoma of B cell type is a novel B-lymphoma variant.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 224 (1977), S. 34-35 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 242 (1987), S. 396-398 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung DNA-Ploide und S-Phasen-Anteil in Ovarialkarzinomen haben sich als Prognosefaktoren bewährt. Unter den serösen und endometrioiden Karzinomen sind diploide Tumoren und Tumoren mit niedrigem S-Phasen-Anteil prognostisch günstiger einzuschätzen als DNA-aneuploide Tumoren oder Tumoren mit höherem S-Phasen-Anteil. Insbesondere der Ploidiegrad erweist sich als ein stabiler Parameter, der auch in einem histologisch heterologen Tumor sich nur selten ändert.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Archives of gynecology and obstetrics 224 (1977), S. 32-33 
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-0711
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Zusammenfassung Die Diskussion und das Vorlegen von Erfahrungsberichten im Arbeitskreis hat ergeben, daß eine Früherkennung des Endometriumcarcinoms mit geeigneten morphologischen Methoden grundsätzlich möglich ist. In mehreren Publikatonen wird von einer hohen Erfolgsrate in der Ausbeute des zytologisch aufgearbeiteten intrakavitär gewonnenen Materials gesprochen, die in einzelnen günstig gelagerten Fällen mehr als 90% erreicht. Hier handelt es sich ausschließlich um Testergebnisse vieler Geräte, die unter optimalen Bedingungen erhoben worden sind. Der Arbeitskreis äußerte die Meinung, daß dieses Ergebnis unter ambulanten Bedingungen zum gegenwärtigen Zeitpunkt kaum erreicht werden kann. Die Ursache dafür sind beeinflussende variable Faktoren, die die Auswertbarkeit des intrakavitär gewonnenen Materials einschränken, in manchen Fällen sogar unmöglich machten. Hierzu gehören u. a. Arbeitsgänge wie Materialgewinnung, die Materialverarbeitung oder das Einschätzen von besonderen anatomischen Gegebenheiten. In diesen Zusammenhang gehört auch die möglichst klare und eindeutige Beschreibung und Interpretation des morphologischen Befundes, was wiederum eine zentrale Einrichtung mit geschultem und erfahrenen Personal erfordert. Solange diese Erfordernisse nicht erfüllt sind, werden diese Methoden als Screeningverfahren im Rahmen der Früherkennung des Endometriumcarcinoms noch nicht allgemein praktikabel sein.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 375 (1990), S. 95-101 
    ISSN: 1435-2451
    Keywords: Thyroid ; Follicular adenoma ; Follicular carcinoma ; Stereology ; Flow cytometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Gut differenzierte follikuläre Neoplasien (FN) der Schilddrüse wurden unter der Frage analysiert, ob eine Differentialdiagnose ausschlielßlich anhand zytometrischer Kriterien möglich ist. Es wurden stereologische und flowzytometrische Tumorzellcharakteristika von 15 follikulären Karzinomen (FK) and 15 follikulären Adenomen (FA) untersucht mit den morphometrischen Primdrädaten Fldche, Umfang, Schnittsehnenldnge, numerische Dichte der Tumorzellkerne and der neue stereologische Schätzwert Vv. FK and FA unterschieden sich in keinem der untersuchten Tumorzellkernparameter. Diploide und aneuploide Tumoren kamen in beiden Gruppen gleichhdufig vor. Im Vergleich von diploiden mit aneuploiden FN zeigen aneuploide eine signifikante Vergrölßerung von Fläche, Umfang and Volumen der Tumorzellkerne. Unsere Ergebnisse schlielßen eine Differentialdiagnose der FN allein auf der Basis eines Aspirates aus. Die mangelnde zytologische Differenzierbarkeit zwischen beiden Typen der FN and der Nachweis malignomtypischer Stigmata bei den FA geben zu der Vermutung Anlaß, daß einige FA prdinvasive Karzinome sent könn-ten, die zum Zeitpunkt der Diagnose noch kein infiltratives Wachstum zeigen.
    Notes: Summary Fifteen resected follicular adenomas and 15 well-differentiated follicular carcinomas of the thyroid gland were analysed to determine whether a differential diagnosis of both “follicular neoplasms” can be performed by cytological criteria exclusively. 150–200 tumor cell nuclei (TCN) were studied per case for their TCN profile area, perimeter, density and for stereological estimates including the new parameter Vv, volume-weighted mean particle volume. Flow-cytometric analyses included measurement of the DNA index, the percentage of cells in S-phase and in G2/M phase. Follicular adenomas and follicular carcinomas did not show any significant differences in stereological estimates related to TCN size. Both groups included similar proportions of diploid and aneuploid neoplasms. Aneuploid follicular neoplasms showed a significantly greater area, perimeter and volume of TCN as compared to diploid tumors, regardless of their histological diagnosis. From our results a differential diagnosis of follicular neoplasms cannot be performed on the basis of cytological aspirates exclusively. Infiltration of capsula or vessels remain the only safe indicators of malignancy in the absence of metastases. The lack of cytological differences provides evidence that some follicular adenomas are preinvasive carcinomas, not yet showing infiltrative growth at the time of resection.
    Type of Medium: Electronic Resource
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