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  • 1
    ISSN: 1433-0458
    Schlagwort(e): Key words Glandula parotis ; Basalzelladenokarzinom ; Pathogenese ; Differentialdiagnose ; Therapie ; Key words Parotid gland ; Basal cell adenocarcinoma ; Pathogenesis ; Differential diagnosis ; Therapy
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Summary Basal cell adenocarcinoma is a rare entity that was first defined as a malignant salivary gland tumor in 1991. We present another case report and discuss pathology, pathogenesis, differential diagnosis, therapy and prognosis on the basis of currently available literature. Although histomorphologic features of the tumors are similar to basal cell adenomas, proof of an infiltrative and destructive growth is essential for diagnosis. Adenoid cystic carcinoma and basaloid squamous carcinoma must also be considered in any differential diagnosis. Tumor development within a pre-existing basal cell adenoma and de novo development are discussed. Most of the tumors appear to be benign clinically. Facial pain is rare and facial nerve palsy was noted in only one case. Metastases have occurred in less than 10% of patients, with only one involving the lung. Due to their biologic behavior and prognosis, basal cell adenocarcinomas should be classified as low-grade carcinomas. The therapy of choice is parotidectomy with preservation of the facial nerve. Neck dissection has to be added in cases with cervical metastases. Radiation is advisable in patients with recurrent disease. Since there is a nearly 30% local recurrence rate, intensive follow-up is necessary.
    Notizen: Zusammenfassung Basalzelladenokarzinome sind seltene maligne Speicheldrüsentumoren, die seit 1991 eine eigene Entität darstellen. Anhand eines eigenen Falles und vor dem Hintergrund der Literatur diskutieren wir Fragen der Pathologie, Pathogenese, Differentialdiagnose, Klinik und Therapie. Wegen der meist großen histomorphologischen Ähnlichkeit mit Basalzelladenomen ist der Nachweis von infiltrierendem Tumorwachstum für die Diagnose entscheidend. Auch der solide Typ des adenoidzystischen Karzinoms und das basaloide Plattenepithelkarzinom müssen differentialdiagnostisch abgegrenzt werden. Pathogenetisch wird sowohl eine De-novo-Genese als auch eine Malignomentwicklung in einem vorbestehenden Basalzelladenom diskutiert. Das klinische Bild sowie bildgebende Untersuchungsverfahren lenken den Verdacht zumeist auf einen benignen Parotistumor. Schmerzen sind selten, eine Fazialisparese wird in einem Fall berichtet, Metastasen in weniger als 10%, davon einmal in der Lunge. Basalzelladenokarzinome zählen zu den niedrig-malignen Parotistumoren mit einer guten Prognose. Die Therapie der Wahl besteht in einer Parotidektomie unter Schonung des N. facialis, die ggf. durch eine Neck dissektion ergänzt wird. Eine Nachbestrahlung sollte bei Auftreten eines Rezidivs erwogen werden. Angesichts einer lokalen Rezidivrate von nahezu 30% ist eine engmaschige Nachsorge unerläßlich.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 400 (1983), S. 53-59 
    ISSN: 1432-2307
    Schlagwort(e): Medullary carcinoma of the thyroid ; Mixed medullary and follicular pattern
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary We report a case of medullary carcinoma of the thyroid which on light microscopy showed not only the well known arrangement of cells in sheets and nests but also unequivocal follicular structures. These follicular structures are present both in the primary tumor and in lymph node metastases. Immunohistochemical investigations revealed that the cells lining the follicles produce thyroglobulin, whereas the remaining tumor tissue is positive for calcitonin and carcinoembrionic antigen. This case represents a medullary carcinoma of the thyroid with an atypical pattern consisting of both thyroglobulin and calcitonin producing cells.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 401 (1983), S. 177-184 
    ISSN: 1432-2307
    Schlagwort(e): Malignant hemangioendothelioma of the thyroid ; Factor VIII-related antigen
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Thirty-six malignant hemangioendotheliomas of the thyroid were examined immunohistochemically using antibody probes to factor VIII-related antigen in order to reevaluate the histogenesis of this neoplasia. The 36 cases were reclassified according to their light microscopic features without prior knowledge of the immunohistochemical results. Three different tumor types were discerned: Group I: classical hemangioendotheliomas (20 cases); Group II: borderline cases between malignant hemangioendotheliomas and anaplastic carcinomas (14 cases) and Group III: anaplastic carcinomas with hemangio-endotheliomatous features (2 cases). Factor VIII-related antigen could be demonstrated in 12 (60%) tumors of group I, 3 (21%) tumors of group II and in neither tumor of group III. Five control cases with the typical histological picture of anaplastic carcinoma of the thyroid were negative for factor VIII-related antigen. The results of our study suggest that at least part of the tumors termed as malignant hemangioendotheliomas are in fact derived from endothelial cells.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Virchows Archiv 411 (1987), S. 387-393 
    ISSN: 1432-2307
    Schlagwort(e): Malignant mesothelioma ; Immunohistochemistry
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The histological diagnosis of malignant mesothelioma of the pleura, especially the distinction from peripheral adenocarcinoma of the lung, may be difficult. The immunohistochemical reports previously published on this subject show diverging results mainly because a variety of antibodies and staining techniques have been used by the different authors. To obtain comparable and reproducible results standard techniques and commercialized antibodies should be applied in routine pathology. In order to investigate the value of immunohistochemistry for the separation of the two entities formalin fixed and paraffin embedded blocks of 47 mesotheliomas and 22 adenocarcinomas were investigated with the PAP technique and commercially available antibodies to carcino-embryonic antigen (CEA), keratin, vimentin, epithelial membrane antigen (EMA), pregnancy specific antigen (SP1), S-100 protein and monoclonal antibody lu-5 (mAB lu-5). CEA positivity was found in all 22 adenocarcinomas examined, but only 2/47 (4%) of all mesotheliomas showed a positive result. SP1 was positive in 13/22 (59%) of the adenocarcinomas, whereas only 3/47 (6%) mesotheliomas were positive for this marker. No significant difference in the rate of positive cases in the adenocarcinoma and mesothelioma group could be found with the other above mentioned antigens. The results of our study indicate that especially CEA, but also SP1 are valuable markers in the diagnosis of malignant mesothelioma.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    ISSN: 1432-119X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract  CD44 isoforms have been implicated in tumor progression and metastasis formation. This study presents a thorough immunohistochemical analysis of CD44 standard and isoform expression in normal human skin appendages and epidermis applying monoclonal antibodies against CD44s, CD44v3, -v4, -v5, -v6, and -v9. An improved immunohistochemical protocol with microwave-based antigen retrieval in paraffin sections and heavy metal amplification of the diaminobenzidine reaction product provided enhanced resolution and sensitivity as compared to studies on frozen sections. The hair follicle, the seborrheic and eccrine sweat glands were strongly positive for all CD44 isoforms studied. In the latter, the clear cells but not the dark (intercalated) cells were positive. The sudoriferous ducts adjacent to the glands were weakly positive for all CD44 isoforms and strongly positive near the skin surface. In the apocrine glands, the basal cells showed only a moderate positivity. The myoepithelial cells expressed only CD44s. In the epidermis, all CD44 isoforms were detectable, with strongest CD44 immunostaining in the lower third of the stratum spinosum and weaker staining in the stratum basale and the upper two-thirds of the stratum granulosum. The stratum granulosum and corneum were unreactive. Thus, a regional and cell type-specific CD44 expression was revealed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    ISSN: 1432-119X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract CD44 isoforms have been implicated in tumor progression and metastasis formation. This study presents a thorough immunohistochemical analysis of CD44 standard ann isoform expression in normal human skin appendages and epidermis applying monoclonal antibodies against CD44s, CD44v3,-v4,-v5,-v6, and-v9. An improved immunohistochemical protocol with microwave-based antigen retrieval in paraffin section and heavy metal amplificatio of the diaminobenzidine reaction product provided enhanced resolution and sensitivity as compared to studies on frozen sections. The hair follile, the seborrheic and eccrine sweat glands were strongly positive for all CD44 isoforms studied. In the latter, the clear cells but not the dark (intercalated) cells were positive. The sudoriferous ducts adjacent to the glands were weakly positive for all CD44 isoforms and strongly positive near the skin surface. In the apocrine glands, the basal cells showed only a moderate positivity. The myoepithelial cells expressed only CD44s. In the epidermis, all CD44 isoforms were detectable, with strongest CD44 immunostaining in the lower third of the stratum spinosum and weaker staining in the stratum basale and the upper two-thirds of the stratum granulosum. The stratum granulosum and corneum were unreactive. Thus, a regional and cell type-specific CD44 expression was revealed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 7
    ISSN: 1432-1963
    Schlagwort(e): Schlüsselwörter Schilddrüse ; Dünndarm ; Leiomyosarkom ; unbekannter Primärtumor ; Key words Thyroid gland ; Small intestine ; Leiomyosarcoma ; Unknown primary tumour
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Summary In a 69-year-old female patient a moderately pleomorphic spindle-cell thyroid tumour measuring 5 cm in diameter was initially misinterpreted as primary anaplastic thyroid carcinoma. During clinical investigations to elucidate the cause of severe anaemia, 17 months later an ulcerated duodenal leiomyosarcoma was detected and removed by duodenopancreatectomy. Reevaluation of the thyroid nodule led to revision of the initial diagnosis to metastatic leiomyosarcoma. Six months later the patient died from cerebral stroke. Autopsy findings confirmed the diagnosis of primary leiomyosarcoma of the duodenum with initial manifestation as thyroid metastasis.
    Notizen: Zusammenfassung Bei einer 69 jährigen Patientin wurde ein 5 cm großer, mäßig pleomorpher spindelzelliger Schilddrüsentumor zunächst als primäres anaplastisches Schilddrüsenkarzinom verkannt. Erst im Rahmen einer 17 Monate später durchgeführten Anämieabklärung wurde ein 7 cm durchmessendes duodenales Leiomyosarkom entdeckt und mittels Duodenopankreatektomie reseziert. Die erneute Beurteilung der Primärhistologie führte zur Revision der initialen Diagnose und zur Einstufung des Schilddrüsentumors als metastatisches Leiomyosarkom. Die Patientin verstarb weitere 6 Monate später an einem apoplektischen Insult. Die Autopsiebefunde bestätigten die Einschätzung des Tumorleidens als ein initial durch die Schilddrüsenmetastase manifest gewordenes intestinales Sarkom.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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