Search results for "Coma"
showing 10 items of 1084 documents
Fibroblast and Myofibroblast Participation in Malignant Fibrous Histiocytoma (MFH) of Bone
1989
Eight malignant fibrous histiocytomas (MFH) of bone were studied with immunohistochemistry and electron microscopy. Ultrastructurally, fibroblasts and myofibroblasts were the main tumor cells in four cases and abundant in two other cases; these cells showed immunohistochemical positivity to alpha 1-antitrypsin, vimentin and anti-muscle antigen (HHF 35). Moreover, histiocytic-like tumor cells were electron-microscopically detected in four cases, being the main tumor cell type in two of the cases; immunohistochemically these cells expressed positivity to alpha-1-antichymotrypsin (A1ACT), alpha-1-antitrypsin (A1AT) and vimentin. Present results confirm the cellular heterogeneity of MFH of bone…
An immunohistochemical and biochemical study of cytokeratin polypeptides in a non-Paget type adenocarcinoma of the vulva
1988
SummaryThe intermediate filament composition was studied in a malignant neoplasm of the vulva in a 42 year old patient. The absence of vimentin excluded the diagnosis of malignant melanoma. Anaplastic squamous cell carcinoma could be excluded by the presence of glandular type cytokeratins numbers 7, 8, 18, 19 in the neoplastic cells. Intermediate filament typing did not support a diagnosis of epithelioid sarcoma. Since the typical epidermal involvement by tumour cells was lacking, Paget's disease was excluded. Metastatic adenocarcinoma was excluded by the lack of relevant clinical findings. It was concluded that the lesion represented an adenocarcinoma of the vulva of the non-Paget type mos…
‘Pyogenic granuloma-like Kaposi's sarcoma’ on the hands: immunohistochemistry and human herpesvirus-8 detection
2009
Letter to Editor
Malignant peripheral nerve sheath tumor of the maxila
2005
Summary We present a case of a malignant peripheral nerve sheath tumor [MPNST] of the maxilla corresponding to a 12 year old male who had a painful, ulcerated rapid growing tumor. Histology revealed the presence of a tumor consisting of fusiform cells with abundant mitosis, with negative cytokeratins, actin, desmin, myoglobin and factor VIII. In contrast, the protein S-100 was positive. MPNST was not associated with signs of Neurofibromatosis Type 1. The patient was surgically intervened and received radiotherapy, then died within 10 months posterior to surgical intervention after suffering recurrence.
Chirurgische Strategien bei Schilddrüsenerkrankungen im Kindes- und Jugendalter
1990
In the Department of Paediatric Surgery of the University Hospital of Mainz and the Department of Paediatric Surgery of the University Hospital of Frankfurt/M 90 children with thyroid gland lesions were operated on between 1970 and 1988. 78 patients had benign findings and 12 had malignant tumours. The most frequent operative indication for benign lesions was the euthyroid goitre (57 patients). We found nodular goitre in 45 patients, cystic goitre in 11 patients, and diffuse goitre in only 1 patient. 20 children were suffering from hyperthyroidism (11 with Basedow's disease, 9 with autonomy) and 1 from Hashimoto's thyroiditis. Among the malignant tumours, papillary carcinomas were the most …
Optical coherence tomography and Raman spectroscopy for ex vivo characterization of canine skin and subcutaneous tumors: preliminary results
2021
Cancer is one of the leading causes of companion animal mortality. Up to 30% of all canine and feline tumors appear on or directly under the skin. To date, only a limited number of studies applied biophotonics techniques for optical characterization and detection of tumors in pets. In this work, we acquired ex vivo optical coherence tomography (OCT) images and Raman spectra of native skin and the most common canine and feline skin and subcutaneous tumors; lipomas, mast cell tumors, and soft tissues sarcomas. Lipomas exhibited the most distinctive tissue morphology (i.e., honeycomb structure) and biochemistry (lipid-related Raman peaks of 1063, 1301, and 1652 cm-1). Moreover, lipomas had sig…
The intraclonal and interclonal phenotypic heterogeneity in a rhabdomyosarcoma cell line with abortive imitation of embryonic myogenesis
1988
Three distinct subpopulations (A, B, C) derived from a dimethylbenzanthracene-induced rat rhabdomyosarcoma were established as permanent cell lines. Although the clonal nature of each of these subpopulations was confirmed by repeated recloning procedures, a striking intraclonal phenotypic heterogeneity was observed. By means of immunofluorescence microscopy and transmission electron microscopy, it could be shown that these subpopulations closely recapitulate stages of embryonic rhabdomyogenesis both in vitro and in vivo, but differ in their particular range of maximum differentiation. Embryonic rhabdomyogenesis is imitated most perfectly by subpopulation C, in which multinuclear myotubes ar…
Primary Rhabdomyosarcoma Mimicking a Small Cell Sarcoma of Bone: A Nude Mice Xenograft, Cytogenetic, and Molecular Approach
1998
Small cell sarcomas of bone are difficult to classify and diagnose. The present case deals with such a tumor in which the original biopsy and the resected specimen, studied by histology before chemotherapy, provided no final information about its real nature. Thus several techniques were applied to discern its histogenesis and biology. Myogenin proved positive in isolated cells of the primary neoplasm but was extensively expressed in nude mice xenografts. Electron microscopy confirmed the existence of myofilaments. The cytogenetic analysis revealed a large number of chromo somal abnormalities, but not those found in the Ewing's/PNET (peripheral neuroectodermal tumor) family of tumors. This…
Das Chlorom (Granulozytäres Sarkom, Myeloblastom) - Klinik und radiologische Diagnostik -
2000
Six cases of granulocytic sarcoma are presented. A mediastinal chloroma and a tumor of the submandibular gland were observed with two patients as single sign of acute myeloic leukaemia. In one patient a chloroma appeared as first manifestation of acute myeloic leukaemia. Two patients exhibited the tumor as first symptom of a blastic crisis of chronic myelogenous leukaemia (femoral bone, lumbar spine). The sixth patient with a myelodyplastic syndrom showed a chloroma of the breast. Various radiological procedures were applied including plain radiography, MRT, CT and mammography. The results are compared with literature. Principles of therapy were supplemented.
DNA strand breaks induced by nuclear hijacking of neuronal NOS as an anti-cancer effect of 2-methoxyestradiol
2015
2-Methoxyestradiol (2-ME) is a physiological metabolite of 17β-estradiol. At pharmacological concentrations, 2-ME inhibits colon, breast and lung cancer in tumor models. Here we investigated the effect of physiologically relevant concentrations of 2-ME in osteosarcoma cell model. We demonstrated that 2-ME increased nuclear localization of neuronal nitric oxide synthase, resulting in nitro-oxidative DNA damage. This in turn caused cell cycle arrest and apoptosis in osteosarcoma cells. We suggest that 2-ME is a naturally occurring hormone with potential anti-cancer properties.