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Langerhans cell histiocytosis (LCH) is a proliferative disorder of Langerhans cell (LC)-like CD1a-positive cell (LCH cell) with unknown causes. LCH consists of two subtypes: single-system LCH (LCH-SS) with favorable prognosis and multisystem LCH (LCH-MS) with poor prognosis. LCH has been indicated
A 23 yr old man was admitted suspected of having a liver disease because of marked elevation of the serum alkaline phosphatase. A biopsy of the liver was without cholestasis. A skin biopsy of a papule was compatible with eosinophilic granuloma. Over a few months the patient developed severe
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
To better characterize the diagnostic criteria and clinical behavior of malignant histiocytosis, 20 patients treated at the Mayo Clinic during a 25-year period were studied. A wide spectrum of cytologic differentiation was observed, with cells ranging from bland to highly anaplastic;
Clinical profile, disease-distribution and outcome of Langerhans cell histiocytosis (LCH) is presented in this retrospective analysis. There were 69 children with LCH from January 1986 to December 2004. Diagnosis was presumptive in the majority. The age ranged from 2 months to 12 years. Multisystem
A new cell line DEL, established in vitro, was isolated from a pleural effusion of a boy who died of malignant histiocytosis. Its principal characteristics are: strong positivity with monoclonal antibodies (MAbs) to CD25, CD30, CD45R, KiM7, EMA, HLA Cl I and II; constant presence of acid
A 15-year-old female was treated for malignant histiocytosis. The occurrence of a leukemic phase (178,000 blasts/cu mm) during the follow up provided the opportunity of studying a large number of malignant cells by cytochemical electron microscopic, and cell membrane markers techniques. Acid
Tumour cells from three cases of malignant histiocytosis of the intestine (MHI) have been studied immunologically and cytochemically. The cells did not form E rosettes and showed weak Fc gamma surface receptors. They contained non-specific esterase and acid phosphatase in diffuse granular
The light- and electron-microscopic features and histochemical characterization of three consecutive cases of malignant histiocytosis (MH) are reported. Each case demonstrated involvement of lymph nodes and bone marrow. In the lymph node, the characteristic destructive sinusoidal pattern of
This report is a cytological and functional description of 3 cases of malignant histiocytosis (MH). These patients suffered from an intense proliferation of histiocytic cells that occurred predominantly in the bone marrow in 2 cases (the primitive cell type of MH), and in the spleen, liver and
Twenty-five cases originally diagnosed as malignant histiocytosis/true histiocytic lymphoma were reviewed according to both pathological and clinical criteria. Microscopically, they were characterized by large, pleomorphic tumour cells showing variable degrees of atypia and phagocytic activity. The
Clinically, malignant histiocytosis is a malignant neoplasia with poor prognosis. Diseased are lymphnodes (especially cervical nodes), liver, spleen and bones. Few cases become leukemic. The cells show characteristic pale roundish, often indented nuclei, without large nucleoli and with abundant
Light and electron microscopical, immunohistochemical and clinical characteristics in 42 cases of malignant neoplasms, arising from true histiocytes, are described. These were separated in a lymphoma-like subtype, called true histiocytic lymphoma (29 patients) and a disseminated variant, called
The clinicopathological data on 20 cases of malignant histiocytosis (MH) collected over a period of 30 years at the Hôpital des Enfants Malades (Paris) are reported. Childhood MH was characterized by disseminated, frequently tender lymphadenopathy (19/20), skin (8/20), bone (6/20), and soft tissue