Publications by authors named "Jens Krugmann"

Background: Diagnosing low grade intraepithelial neoplasia (LGIN) in patients with ulcerative colitis (UC) is difficult. Distinguishing between sporadic adenoma (SA) and UC associated LGIN is even more challenging but has clinical impact. We aimed to examine, if the morphological distinction between both entities is reliably possible, how it influences patient's outcome and the role of the endoscopist in this decision with respect to current endoscopy classification schemes.

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Background: Cytological analysis of ascitic fluid is an important tool for diagnosis, staging, and prognostic assessment in patients with cancer, but more detailed information is needed regarding malignancy rates and the time sequence in which ascites develops for different sites of cancer origin. Especially, an increased early tumor diagnosis may improve the acceptance for cytological examinations for the tumor patients in oncological practice.

Methods: Ascites specimens from patients who were treated at Bayreuth Hospital from 2006 to 2015 were reevaluated retrospectively and correlated with clinical reports.

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Malignant melanoma metastases are chameleons of histopathology. In 4 primary malignant melanomas and 20 melanoma metastases expression of S-100, HMB-45 and melan-A as melanoma markers and CD56, synaptophysin and chromogranin-A as neuroendocrine markers was retrospectively analyzed. While all primary tumors expressed all 3 melanoma markers 7/20 of melanoma metastases had lost at least one melanoma marker, one had lost all three markers.

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Grading for colorectal carcinoma (CRC) is traditionally based on the percentage of gland formation. In recent years, high-grade CRC has become subject to more precise molecular grading strategies. Most, however, are low-grade cases according to the World Health Organization (WHO) with inhomogenous outcomes due to still insufficient characterization.

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Background: Malignant ascites often develops in patients with ovarian cancer, but there is a lack of more detailed characterization of the different histological subtypes.

Methods: Ascites specimens from patients with ovarian cancer who were treated at Bayreuth Hospital from 2006 to 2015, with follow-up until December 2016, were reevaluated retrospectively.

Results: A total of 191 women (mean age 64 years, range 48-79) were included, of whom 180 (94.

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Gastroesophageal reflux disease (GERD) is a diagnosis applicable to "all individuals who are exposed to the risk of physical complications from gastroesophageal reflux, or who experience clinically significant impairment of health related well being (quality of life) due to reflux related symptoms, after adequate reassurance of the benign nature of their symptoms". It remains, predominantly, a symptom-based diagnosis, confirmed clinically by a response to acid suppression therapy although it is accompanied by demonstrable increases in acid exposure on esophageal pH-metry and by endoscopic and histological changes. Standard white light endoscopy permits diagnosis of erosive reflux disease (ERD) which, if present, should be graded for severity using the Los Angeles classification system.

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The aim of this study was to determine genetic alterations in mucoepidermoid carcinomas of the salivary gland in association with clinical and histopathological parameters. Nineteen formalin-fixed, paraffin-embedded tumors were analysed by using comparative genomic hybridization (CGH), fluorescence in situ hybridization (FISH) on interphase nuclei and reverse transcriptase-polymerase chain reaction (RT-PCR) for detection of MECT1-MAML2 fusion transcript. The CGH analysis showed an overrepresentation of chromosome X and losses of entire chromosomes or regions on chromosome 1, 2, and 15 as the most frequent copy number changes.

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Targeting the ubiquitin-proteasome pathway with the proteasome inhibitor bortezomib has emerged as a promising approach for the treatment of several malignancies. The cellular and molecular effects of this agent on colorectal cancer cells are poorly characterized. This study investigated the antiproliferative effect of bortezomib on colorectal cancer cell lines (Caco-2 and HRT-18).

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Background: Somatic mutations in the tyrosine kinase domain of the epidermal growth factor receptor (EGFR) are involved in tumorigenesis and response to targeted therapies in distinct cancer types. Squamous cell carcinomas of the head and neck (HNSCC) show an incidence of EGFR mutations varying from 7% in Asians to 0% to 4% in white patients. Mutational screening predominantly focuses on the analysis of hotspot regions of EGFR (exons 19 and 21).

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Approximately 5% of B-cell chronic lymphocytic leukemia (B-CLL) patients develop a secondary aggressive lymphoma, usually of diffuse large B-cell type (DLBCL), termed Richter's transformation (RT). Rarely, classic Hodgkin lymphoma (HL) is observed. Published small series suggest that tumor cells in DLBCL and HL can be clonally identical to the B-CLL clone or arise as an independent, secondary lymphoma.

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Multiple myeloma (MM) frequently shows overexpression of cyclin D1, either due to a t(11;14)(q13;q32) translocation, or in association with polysomy 11. The predominant expression of a cyclin D1 mRNA isoform lacking the 3'-untranslated region (Delta3'UTR) is associated with higher total cyclin D1 mRNA levels, increased proliferation and poor prognosis in mantle cell lymphoma, and can be caused by genetic alterations of the 3'UTR region. The role of this cyclin D1 isoform in MM is unknown.

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Hemolytic uremic syndrome (HUS) is a rare complication following solid organ transplantation. We report on a patient who underwent renal transplantation using Campath-1H induction and tacrolimus maintenance therapy who developed HUS, which was managed by plasma exchange and switch to Rapamycin. However, graft function could not be restored.

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Objectives: The aim of the study was to determine the impact of socioeconomic status on relapse-free survival (RFS) in patients with Hodgkin's disease.

Methods: A number of factors were analyzed for their impact on relapse-free and overall survival in Hodgkin's disease using Cox regression. These factors included socioeconomic status (as defined by education and income), different treatment modalities and established clinical risk factors [e.

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In 1974, a 28-year-old man presented with a 12 cm sized ulcerated tumor involving the middle third of the stomach, which was originally diagnosed as "lymphosarcoma". Clinical recurrence of the lymphoma resulted in rapidly progressing disease and the patient died 4 months after initial diagnosis. Retrospective work-up of the 29-year-old tumor blocks revealed the typical histologic appearance and phenotype (CD20, CD10, BCL-6 positive) of Burkitt's lymphoma (BL) with a proliferation rate of 95%.

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The proinflammatory cytokine tumor necrosis factor (TNF)-alpha has been shown to facilitate leukocyte transendothelial migration. In multiple myeloma, TNF-alpha is an important factor in the promotion of growth and survival of the malignant cells. Studies have shown that enhanced TNF-alpha levels in myeloma patients correlated with aggressive disease.

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Purpose: The identification of malignant cells in effusions by conventional cytology is hampered by its limited sensitivity. The aim of this study was to improve tumor cell detection in effusions by molecular approaches.

Materials And Methods: A total of 157 effusions from patients with tumors and 72 effusions from patients without a history or evidence of malignancy were included in this study.

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We analyzed Epstein-Barr virus association in classical Hodgkin's lymphoma from a single center in Austria with special emphasis on the latent membrane protein1 gene configuration and clinical outcome. All 119 (65 male, 54 female) patients were treated from 1974 to 1999 in the Division of Hematology and Oncology at the Department of Internal Medicine, University of Innsbruck, Austria. The mean follow-up time was 122 months (range, 3-333 mo).

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Purpose: Recent evidence has demonstrated that classical Hodgkin lymphoma (cHL) originates from mature germinal center B cells. However, only approximately 25% of cHLs express the classical B-cell marker CD20. There is very little, and controversial, information on the prognostic significance of CD20 expression in cHL with regard to failure-free (FFS) and overall survival (OS).

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