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Seite 1 von 17 Ergebnisse
Splenic fibrosis and sarcomas in F344 rats fed diets containing aniline hydrochloride, p-chloroaniline, azobenzene, o-toluidine hydrochloride, 4,4'-sulfonyldianiline, or D & C red No. 9.
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In six carcinogenicity bioassays, male and female F344 rats were fed diets containing aniline hydrochloride (CAS: 142-04-1; hydrochloride benzenamide), p-chloroaniline (CAS: 106-47-8), azobenzene (CAS: 103-33-3), o-toluidine hydrochloride (CAS: 636-21-5), dapsone (CAS: 80-08-0;
[Experimental study of ortho-toluidine carcinogenicity].
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Ortho-toluidine carcinogenicity has been tested in chronic experiments using mice, rats and dogs. Tumors were induced in 19% of mice (lung and kidney adenomas, leukemia), rats--40% (subcutaneous fat tumors, mammary fibroadenomas, leukemia, renal tumors and hepatic sarcoma). Bladder tumors developed
Bioassay of o-toluidine hydrochloride for possible carcinogenicity.
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A bioassay of o-toluidine hydrochloride for possible carcinogenicity was conducted by administering the test chemical in feed to F344 rats and B6C3F1 mice. Groups of 50 rats of each sex and 50 mice of each sex were administered o-toluidine hydrochloride at one of several doses, either 3,000 or 6,000
Prognostic significance of mast cells in soft tissue sarcoma.
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We counted the number of toluidine blue positive mast cells within and around the tumor in 44 patients with soft tissue sarcomas (STS). Irrespective of their histologic types, these cases were broadly divided into the following two groups: (1) low count (less than 20 mast cells/10 high-power fields
New photodynamic therapy protocol to treat AIDS-related Kaposi's sarcoma.
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OBJECTIVE
The aim of this study was to evaluate the efficiency of photodynamic therapy (PDT) with phenotiazinium compounds (methylene blue and toluidine blue) and excitation by a non-coherent light source (RL50) to treat AIDS-related Kaposi's sarcoma (Sk-AIDS).
BACKGROUND
Sk-AIDS is a malignant
Morphologic and immunophenotypic properties of neoplastic cells in a case of mast cell sarcoma.
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Mast cell sarcoma is an extremely rare and aggressive type of mast cell disease. Only a few cases have been described so far, and little is known about the biology and phenotype of afflicted cells. We describe morphologic and immunophenotypic properties of neoplastic mast cells in a case of an
Mast-cell sarcoma of the tibia.
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The mast-cell sarcoma of a bone is described here for the first time. The tumour presented in a 4-year-old boy, with pain, oedema and deformation of his right lower leg. Radiological findings revealed a destructive tumourous mass. Histopathological examination showed the tumour to be composed of
Brief communication, Histopathology of a spontaneously developing mast cell sarcoma in a Wistar rat.
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A case report is given of a very rare spontaneous mast cell tumor in the eyelid of the left eye of a female Wistar rat used in a long-term oral toxicity study. Metastasis of the tumor had occurred in the mandibular lymph nodes and in the liver. Clinically, the animal showed blepharospasm,
A neoplastic connective tissue mast cell capable of continuous growth in tissue culture.
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A neoplastic connective tissue mast cell from a dog mast cell sarcoma has been grown in tissue culture for 50 passages over a period of 2 years. The cells were grown as monolayer cultures in glass bottles, using Eagle's basal medium fortified with calf serum. The cultures were contaminated with an
[Bacillary angiomatosis].
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Bacillary angiomatosis is a bacterial disease which affects mainly immunosuppressed patients. It may compromise any tissue, especially the skin, presenting papules, nodules or angiomatous tumors. We studied three young men with AIDS, all of them with 1-2 papules, nodules or subcutaneous tumors
Diagnostic Value of Calretinin in Mast Cell Lesions of the Skin.
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The diagnosis of mast cell lesions of the skin can occasionally be challenging. Calretinin, a 29 kD neuron-specific calcium-binding protein found mostly in the CNS and retina, has been shown to be a positive marker for mesotheliomas, and is also expressed in mast cells. We studied the diagnostic
Workers' response to risk notification.
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Since 1988, the National Institute for Occupational Safety and Health (NIOSH) has notified workers who were subjects in occupational epidemiology studies of the study findings ("worker notification"). This paper describes seven notifications and the worker's reactions to them. The chemicals of
Sequential appearance of basophils and mast cells from human bone marrow in long-term suspension culture.
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Human bone marrow cells grown in liquid culture in the presence of conditioned medium from concanavalin A stimulated peripheral blood mononuclear cells, from mixed lymphocyte reactions, or from an osteogenic sarcoma tumor line gave rise to basophils which were maximal in number at 1-3 weeks.
Use of alkaline phosphatase staining to differentiate canine osteosarcoma from other vimentin-positive tumors.
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Aspiration of lytic bone lesions is an excellent diagnostic test in the initial evaluation of primary bone neoplasia. However, cytologically, it can be difficult to differentiate osteosarcoma (OSA) from other bone neoplasms, including fibrosarcoma, chondrosarcoma, synovial cell sarcoma, and plasma
Morphology and immunophenotype of canine cutaneous histiocytic tumours with particular emphasis on diagnostic application.
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This study evaluated the morphology and immunohistochemistry of 85 canine cutaneous histiocytic tumours. The tumours were classified morphologically as either canine cutaneous histiocytomas (71 tumours) or canine cutaneous histiocytic sarcomas (14 tumours). The immunohistochemical analysis was
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