Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 395 (1982), S. 11-43 
    ISSN: 1432-2307
    Keywords: Myoepithelial sialadenitis ; Sjögren's syndrome ; Non-Hodgkin's lymphoma ; LP immunocytoma ; Immunoblastic lymphoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Forty-five cases of myoepithelial sialadenitis (MESA) were investigated histologically, immunologically, and clinically. Two patients with clinical evidence of Sjögren's syndrome were also included in the study, though salivary gland biopsies showing MESA were not available. A total of 16 patients had Sjögren's syndrome or another type of autoimmune disease. In 42 cases of MESA, so-called proliferation areas composed of immunoblasts and lymphoplasmacytoid cells were found. The proliferation areas were small and circumscribed in 16 cases, and extensive and confluent in 26 cases. All the confluent proliferation areas analyzed with the immunoperoxidase (PAP) method showed a monotypic immunoglobulin pattern (predominantly IgM/κ). Extrasalivary malignant lymphoma with the same histologic and immunohistologic features as the confluent proliferation areas was found in 14 patients. Thus, this type of MESA is called “manifest malignant lymphoma”. The tumor was classified as LP immunocytoma in 23 patients, and as LP immunocytoma transforming into immunoblastic lymphoma in three patients. One patient developed nodal B-immunoblastic lymphoma. The term “early lymphoma” is suggested for MESA with circumscribed proliferation areas showing a monotypic immunoglobulin pattern (usually IgM/κ), because extrasalivary malignant lymphoma developed later in four of the patients with this type of MESA. The two patients with only clinical evidence of Sjögren's syndrome also showed extrasalivary malignant lymphoma (LP immunocytoma in one case and immunoblastic lymphoma in the other). There is a close histogenetic relation between MESA with or without autoimmune disease and certain malignant non-Hodgkin's lymphomas of B type, namely, LP immunocytoma and B-immunoblastic lymphoma. The interval between the appearance of salivary gland enlargement and the diagnosis of malignant lymphoma varied from 1.5 to 12 years. Generalization of malignant lymphoma led to death in 11 cases.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1432-0584
    Keywords: C3 receptors ; Germinal center cells ; Non-Hodgkin's lymphoma ; Hodgkin's disease ; C3-Rezeptoren ; Keimzentrumszellen ; Non-Hodgkin-Lymphome ; Morbus Hodgkin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The occurrence and distribution of complement receptors (C3R) were investigated on frozen sections from normal lymphoid tissue and from 185 cases of malignant lymphoma. Various EAC complexes were used: vital EA or glutaraldehyde-fixed EA coated with mouse complement (EAC mouse and Glu-EAC mouse, respectively), human complement (EAC human and Glu-EAC human), or complement from C6-deficient rabbits (EACra-C6-def, Glu-EACra-C6-def). The different EAC complexes showed varying affinity for C3R: Glu-EAC human 〉 EAC mouse = EACra-C6-def 〉 Glu-EAC mouse = Glu-EACra-C6-def 〉 EAC human. The EAC complexes differed not only in their receptor affinity but also in their pattern of binding. On frozen sections of tonsils, EAC mouse, EAC human and EACra-C6-def adhered exclusively to germinal centers and the follicular mantle, whereas Glu-EAC mouse, Glu-EAC human and Glu-EACra-C6-def adhered not only to germinal centers and the follicular mantle but also to parafollicular areas and sometimes to interfollicular regions. The various EAC complexes were also assayed for reactivity to C3b receptors of human erythrocytes and C3R of human tonsil cells. Human erythrocytes (C3b receptor+ and C3d receptor− did not react with EAC mouse, EAC human or EACra-C6-def whereas tonsil cells (C3b and C3d receptor+) showed positive reactions with these complexes. In contrast, Glu-EAC mouse, Glu-EAC human and Glu-EACra-C6-def displayed marked affinity for both the C3b receptors of human erythrocytes and the C3Rof tonsil cells. In connection with previously reported data, these findings indicate that (a) EAC mouse, EAC human and EACra-C6-def react only with receptors for C3d, whereas Glu-EAC human, Glu-EAC mouse and Glu-EACra-C6-def are bound by C3b receptors and probably by C3d receptors as well, and (b) germinal center cells and follicular mantle lymphocytes express C3b and C3d receptors whereas cells in parafollicular areas and those in the interfollicular zone bear only C3b receptors. On frozen sections from a fetal thymus C3R could be clearly demonstrated with Glu-EAC human. The demonstration of C3R on frozen sections from malignant lymphomas with the Glu-EAC human complex revealed C3R on cells from all types of lymphoma except mycosis fungoides, although there were variations in the number of positive cells and in the density of the reaction. C3R were most common and were expressed most densely in two types of germinal center cell tumors, viz. centroblastic/centrocytic lymphoma and centrocytic lymphoma. Combined with the investigation of acid phosphatase activity and the sheep erythrocyte rosette test, analysis of C3R in lymphoblastic lymphomas of the T type led to the distinction of three subtypes, viz. a prethymocytic, a prothymocytic, and a mature thymocytic subtype. In none of the cases of Hodgkin's disease tested could C3R be demonstrated unequivocally on Hodgkin or Sternberg-Reed cells.
    Notes: Zusammenfassung Das Vorkommen und die Verteilung von Komplement-Rezeptoren (C3R) wurde an Gefrierschnitten von normalem lymphatischem Gewebe und von 185 malignen Lymphomen mit verschiedenen EAC-Komplexen [vitale EA und glutaraldehydfixierte EA, beschichtet mit Komplement von der Maus (EAC-Maus, Glu-EAC-Maus), vom Menschen (EAC-Human, Glu-EAC-Human) und zum Teil von C6-defekten Kaninchen (EAC-KC6d, Glu-EAC-KC6 d)] untersucht. Die verschiedenen EAC-Komplexe zeigten eine unterschiedliche Affinität zu den C3-Rezeptoren: Glu-EAC-Human 〉 EAC-Maus = EAC-KC6d 〉 Glu-EAC-Maus = Glu-EAC-KC6d 〉 EAC-Human. Die EAC-Komplexe differierten nicht nur in ihrer Rezeptoraffinität, sondern auch im Haftungsmuster. Die EAC-Maus, EAC-KC6d und EAC-Human hafteten an Gefrierschnitten von Tonsillen ausschließlich im Bereich der Keimzentren und des Follikelwalls, während die Glu-EAC-Human, die Glu-EAC-Maus und die Glu-EAC-KC6d sowohl im Bereich der Keimzentren und des Follikelwalls als auch parafollikulär und bisweilen auch zwischen den Follikeln hafteten. Die Austestung der Reaktivität der verschiedenen EAC-Komplexe gegenüber C3bR von humanen Erythrozyten und C3R humaner Tonsillenzellen ergab, daß sich EAC-Maus, EAC-Human und EAC-KC6d konstant negativ gegenüber humanen Erythrozyten (C3bR+ und C3dR−), aber positiv gegenüber Tonsillenzellen (C3bR+ und C3dR+) verhielten, während die Glu-EAC-Human, Glu-EAC-Maus und Glu-EAC-KC6d eine starke Affinität zu den C3bR der Humanerythrozyten und zu den C3R der Tonsillenzellen zeigten. In Verbindung mit kürzlich mitgeteilten Daten geht aus diesen Befunden hervor, daß a) EAC-Maus, EAC-Human und EAC-KC6d nur mit Rezeptoren für C3d reagieren, während Glu-EAC-Human, Glu-EAC-Maus und Glu-EAC-KC6d eine Bindung mit CSbR- und wahrscheinlich auch mit C3dR eingehen und b) Keimzentrumszellen und Follikelwall-Lymphozyten C3bR und C3dR exprimieren und daß die Zellen der parafollikulären und zum Teil auch der interfollikulären Zone nur den C3bR besitzen. Am Gefrierschnitt eines fetalen Thymus ließen sich mit Glu-EAC-Human eindeutig C3R nachweisen. Der Nachweis von C3R an Gefrierschnitten maligner Lymphome ergab, daß mit dem Komplex Glu-EAC-Human bei allen Lymphomtypen, mit Ausnahme der Mycosis fungoides, C3R nachweisbar waren, allerdings in unterschiedlicher Häufigkeit und Dichte. Am häufigsten und in großer Dichte waren C3R bei den Keimzentrumszelltumoren, dem centroblastisch/centrocytischen Lymphom und dem centrocytischen Lymphom, zu demonstrieren. Die Analyse der C3R bei den lymphoblastischen Lymphomen vom T-Typ führte in Verbindung mit der Untersuchung der sauren Phosphatase und des Schafserythrozyten-Rosettentests zur Abgrenzung von drei Subtypen, nämlich einem Präthymozyten-, einem Prothymozyten- und einem reifen Thymozyten-Subtyp. An Hodgkin- und Sternberg-Reed-Zellen ließen sich in keinem der untersuchten Fälle eindeutig C3R nachweisen.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Surgical endoscopy and other interventional techniques 1 (1987), S. 51-54 
    ISSN: 1432-2218
    Keywords: Choledochoscopy ; Choledochoscope ; Bile duct examination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The use of intraoperative choledochoscopy represents a significant advance in biliary surgery. Flexible instruments are ideal for examining the intrahepatic bile ducts, while rigid instruments are best suited for the extrahepatic ductal system. The cystic duct stump may be occasionally used for access, but, as a rule, a supraduodenal choledochotomy is necessary. Our experience with 776 examinations is reported. A total of 348 patients (44.8%) had ductal stones. In 10 patients (2.8%), a stone was overlooked. Equivocal cholangiograms, ductal stones, and obstructive tumors constitute the most important indications for endoscopic examination.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...