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Page 1 od 144 rezultati
The value of CD34, myeloperoxidase and chloroacetate esterase (Leder) stain in the diagnosis of granulocytic sarcoma.
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BACKGROUND
The differentiation of extramedullary myelogenous leukemia/granulocytic sarcoma (GS) from malignant lymphoma can sometimes be difficult. In the current study, we explored the value of CD34, myeloperoxidase and nonspecific esterase (Leder) stains in differentiating GS from
Orbital granulocytic sarcoma.
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OBJECTIVE
Orbital granulocytic sarcoma is a localised tumour composed of cells of myeloid origin. Histological diagnosis can be difficult in patients with poorly differentiated orbital tumours and no evidence of systemic leukaemia. The naphthol AS-D chloracetate esterase (Leder stain) and
Granulocytic sarcoma presenting as pulmonary nodules and lymphadenopathy.
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A patient presented with anterior and posterior cervical lymphadenopathy as well as widespread intrapulmonary nodules. Histologic sections of both lymph node and lung revealed dense infiltration by sheets of cells which were cytochemically positive for chloroacetate esterase and myeloperoxidase,
Cytochemical and immunocytochemical characterization of Yoshida ascites sarcoma cells.
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Some cytochemical and immunocytochemical investigations were carried out on actively growing Yoshida ascites sarcoma cells. These cells displayed an intense granular alpha-naphthylacetate esterase (ANAE) staining while the alpha-naphthylbutyrate esterase (ANBE) reaction was in part
On the histogenesis of Ewing's sarcoma. An ultrastructural, immunohistochemical, and cytochemical study.
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Forty-two cases of Ewing's sarcoma (ES) have been studied with light microscopy during the 9-year period 1974 to 1982. Thirty-three patients had ES of bone, and in 9 patients the tumor was located in the extraskeletal soft tissues. Cases which fulfilled all the morphologic criteria were accepted as
Characterization of a murine ovarian reticulum cell sarcoma of histiocytic origin.
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We have studied the M5076 tumor, a transplantable murine reticulum cell sarcoma that arose spontaneously in the ovary of a C57BL/6 mouse. This tumor displays functional and ultrastructural characteristics indicating that it is of macrophage origin. Cells from the M5076 tumor are phagocytic, form
Sarcoma arising from interdigitating cells. Cytology and cytochemistry.
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The cytologic features of a highly malignant sarcomatous tumor in a 37-year-old male, arising from interdigitating cells and localized in the mediastinum, lymph nodes and skin, are described. Cytologically this sarcoma was characterized by large cells with ill-defined, faintly basophilic cytoplasm,
Acid alpha-naphthyl acetate esterase in hairy cell leukemia cells and other cells of the hematopoietic system.
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The activity of alpha-naphthyl acetate esterase at an acid pH (ANAE) was investigated in 10 cases of hairy cell leukemia. All 10 cases, including two cases with only a few tartrate-resistant acid phosphatase-reactive cells, revealed a moderate or strong ANAE reaction. There was a characteristic
Macrophage-like cell line (HS-P) from a rat histiocytic sarcoma.
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With future exploration of macrophage properties in mind, we established a novel cell line (HS-P) from a transplantable histiocytic sarcoma, derived originally from a tumour in an aged F344 rat. HS-P was subjected to 70 serial passages, in which the mean doubling time was 15.7 h. The cells, which
Malignant lymphoma of true histiocytic origin: histiocytic sarcoma. A morphological, ultrastructural, immunological, cytochemical and clinical study of 10 cases.
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Ten tumors of true histiocytic origin (Histiocytic Sarcoma) are presented. The tumor cells were identified as histiocytes by immunological, cytochemical and ultrastructural criteria (cytoplasmic lysozyme activity, presence of C3 and Fc gamma receptor, strong acid phosphatase and alpha-naphthyl
Malignant histiocytosis (histiocytic sarcoma). A (the?) major cause of the 'midline granuloma syndrome'.
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Five out of eight consecutive cases with initial symptoms of a 'midline granuloma' were identified as malignant histiocytosis (histiocytic sarcoma) which within 5 months to 4 years led to generalization and death. The three remaining cases also fulfilled the morphological criteria of this type of
Morphological characteristics of a transplantable histiocytic sarcoma (HS-J) in F344 rats and appearance of renal tubular hyaline droplets in HS-J-bearing rats.
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A transplantable tumour (HS-J) was established from a spontaneous histiocytic sarcoma found in a 24-month-old male F344 rat. Serial transplantations (seven generations) were made in syngeneic male and female rats by means of intraperitoneal or subcutaneous implants, with a 100% take rate. Rats given
[Immunoblastic sarcoma (author's transl)].
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A case of immunoblastic sarcoma in a 56-year-old man is presented. He had no history of predisposing diseases. His clinical condition was typical of a highly aggressive disseminated malignant lymphoma and he presented important heterogenous hypergammaglobulinemia. The patient died 9 months after the
Tumour lines from a spontaneous rat endometrial stromal sarcoma, showing dendritic cell-like and myofibroblastic cell-like phenotypes.
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A transplantable tumour (RY) and cell lines (RY-PB and clone RY-B-E3 isolated from RY-PB) were established from a naturally occurring endometrial stromal sarcoma (ESS) found in a 24-month-old female F344 rat. The primary tumour and RY tumours, which had been serially passaged in syngeneic female
Establishment and characterization of transplantable tumor line (KB) and cell lines (KB-P and KB-D8) from a rat thymus-derived dendritic cell sarcoma.
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A transplantable tumor line (KB) was established in syngeneic rats from a naturally occurring sarcoma that had arisen in the thymus of a 24-month-old male F344 rat. Further, a cell line (KB-P) was induced from KB and a cloned cell line (KB-D8) was isolated from KB-P. The primary thymic tumor and KB
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