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1.
Thromb Res ; 218: 145-150, 2022 10.
Artigo em Inglês | MEDLINE | ID: mdl-36049419

RESUMO

Acquired von Willebrand syndrome is a rare bleeding disorder with laboratory findings similar to those of inherited von Willebrand disease. Principal factors distinguishing acquired von Willebrand syndrome from the latter condition include lack of prior bleeding disorders, diagnosis at older age, negative family history and association with underlying conditions. METHODS: Retrospective, monocentric descriptive case series of acquired von Willebrand syndrome diagnosed between 2010 and 2020. Diagnostic criteria included a recent history of bleeding, a negative family history and a presence of underlying disorders. RESULTS: Five men were diagnosed with acquired von Willebrand syndrome. All of them presented with recent mucocutaneous bleeding. The biological phenotype was a type 2 von Willebrand disease in all cases, with decreased VWF:RCo/VWF:Ag and VWF:CB/VWF:Ag ratios (<0.7). Lymphoproliferative, autoimmune and cardiovascular diseases were the main underlying conditions identified. Screening for an anti-von Willebrand factor inhibitor was positive in two patients. Four patients received treatment for the underlying disorder. High-dose intravenous immunoglobulins were the most frequent treatment administrated. Improvement of plasma von Willebrand factor levels was observed in four cases. CONCLUSION: Acquired von Willebrand syndrome is a rare but potentially serious disease. The diagnostic should be suspected in adults with unusual mucocutaneous bleeding associated with lymphoproliferative, myeloproliferative, autoimmune and cardiovascular disorders.


Assuntos
Doenças Cardiovasculares , Doenças de von Willebrand , Doenças Cardiovasculares/tratamento farmacológico , Hemorragia/tratamento farmacológico , Humanos , Imunoglobulinas Intravenosas/uso terapêutico , Estudos Retrospectivos , Doenças de von Willebrand/complicações , Doenças de von Willebrand/diagnóstico , Fator de von Willebrand/uso terapêutico
2.
Ann Biol Clin (Paris) ; 80(4): 355-362, 2022 07 01.
Artigo em Francês | MEDLINE | ID: mdl-36099347

RESUMO

Introduction: Hematological disorders are the third cause of hypereosinophilia, after allergic and parasitic disease. The objective of our study is to show the epidemiological, clinical, biological and therapeutic characteristics of hematological hypereosinophilia. Patients and methods: This is a retrospective study over a 4-year period (March 2017-March 2021) concerning 14 patients with hematological hypereosinophilia. Results: Fourteen patients were included (9 women and 5 men). The median age at diagnosis was 55 years. Hematological hypereosinophilia was mainly of clonal etiology. Clinical manifestations were either specific to hypereosinophilia, such as organ damage, or related to the etiology of hypereosinophilia, such as hepato-splenomegaly and lymphadenopathy. Moderate and severe forms were the most commonly reported. Several other quantitative and qualitative abnormalities of the blood picture were reported. Identification of the FIP1L1-PDGFRA fusion gene by molecular biology (RT-PCR) was positive in two patients. Imatinib was the main treatment for clonal forms. Conclusion: Hematological hypereosinophilia is a rare and complex pathology. Our study has confirmed this epidemiological, clinical, biological and therapeutic heterogeneity and has enabled us to realize the contribution of molecular biology in the diagnosis and the treatment of hypereosinophilia.


Introduction: Les affections hématologiques représentent la troisième cause des hyper éosinophilies. L'objectif de notre travail est d'étudier les caractéristiques épidémiologiques, étiologiques, cliniques, biologiques et thérapeutiques des hyperéosinophilies hématologiques. Patients et méthodes: Il s'agit d'une étude rétrospective menée sur une période de 4 années (mars 2017-mars 2021). Cette étude a colligé 14 patients atteints d'hyperéosinophilie hématologique. Résultats: Quatorze patients ont été inclus (9 femmes et 5 hommes). L'âge médian au moment du diagnostic était de 55 ans. L'hyperéosinophilie hématologique était principalement d'étiologie clonale. Les manifestations cliniques étaient soit spécifiques à l'hyperéosinophilie telles que les atteintes d'organes, soit liées à l'étiologie de l'hyperéosinophilie telles que l'hépato-splénomégalie et les adénopathies. Les formes modérées et sévères étaient les plus fréquemment rapportées. Plusieurs autres anomalies quantitatives et qualitatives de l'hémogramme ont été rapportées. L'identification du gène de fusion FIP1L1-PDGFRA par biologie moléculaire (RT-PCR) était positive chez deux patients. L'imatinib était le traitement de choix des formes clonales. Conclusion: L'hyperéosinophilie hématologique est une pathologie rare et complexe. Notre étude a permis de confirmer cette hétérogénéité épidémiologique, étiologique, clinique, biologique et thérapeutique et de montrer l'apport de la biologie moléculaire dans le diagnostic et le traitement de cette pathologie.


Assuntos
Doenças Hematológicas , Síndrome Hipereosinofílica , Feminino , Doenças Hematológicas/complicações , Doenças Hematológicas/diagnóstico , Doenças Hematológicas/epidemiologia , Humanos , Síndrome Hipereosinofílica/diagnóstico , Síndrome Hipereosinofílica/epidemiologia , Síndrome Hipereosinofílica/etiologia , Mesilato de Imatinib/uso terapêutico , Masculino , Receptor alfa de Fator de Crescimento Derivado de Plaquetas/genética , Estudos Retrospectivos
3.
Ann Biol Clin (Paris) ; 80(2): 119-124, 2022 Mar 01.
Artigo em Francês | MEDLINE | ID: mdl-35766074

RESUMO

Le syndrome de Willebrand acquis (SWa) est un syndrome hémorragique rare dont la fréquence est probablement sous-estimée. Les signes cliniques et le bilan d'hémostase sont comparables à ceux de la maladie de Willebrand héréditaire, mais les patients atteints du SWa n'ont pas d'antécédents hémorragiques, personnels ou familiaux. Il s'agit le plus souvent de personnes âgées et ce sont les saignements cutanéomuqueux qui sont les plus fréquents. Parmi les affections sous-jacentes à l'origine de ce syndrome, les plus fréquentes sont les gammapathies monoclonales, les désordres lymphoprolifératifs, les maladies auto-immunes et les pathologies cardiovasculaires. L'apparition du SWa est liée soit à la présence d'auto-anticorps dirigés contre le facteur von Willebrand (vWF), neutralisant son activité ou accélérant sa clairance, soit à une protéolyse augmentée, soit à une destruction mécanique en présence de forces de cisaillement élevées, soit à une adsorption sur des cellules tumorales ou des plaquettes activées. Le diagnostic du SWa est compliqué du fait de la nécessité d'associer de multiples tests biologiques. La prise en charge thérapeutique est basée sur le traitement de la pathologie sous-jacente et la prévention des saignements.


Assuntos
Síndrome , Humanos
4.
Ann Biol Clin (Paris) ; 71(2): 139-44, 2013.
Artigo em Francês | MEDLINE | ID: mdl-23587576

RESUMO

Myelodysplastic syndromes (MDS) are myeloid disorders with various clinical and biological presentations. The French-American-British (FAB-1982) classification included five categories basing on morphology and bone marrow blast count. Three criteria are taken into account: 1) the percentage of blasts in peripheral blood and bone marrow, 2) the percentage of ringed sideroblasts, and 3) the number of monocytes in peripheral blood. The World Health Organization classification (WHO 2001, 2008) modifies the FAB system by also taking cytogenetic characteristics and molecular biology into consideration. The last classification (WHO-2008) takes into account: 1) the number of peripheral cytopenia, 2) the percentage of blasts in peripheral blood and bone marrow, 3) the percentage of ringed sideroblasts, 4) the possible presence of Auer Rods, and 5) the detection of a cytogenetic abnormality (the isolated 5q deletion). The following subgroups are defined: refractory cytopenia with unilineage dysplasia, refractory anemia with ringed sideroblasts, refractory cytopenia with multilineage dysplasia, refractory anemia with excess blasts, myelodysplastic syndrome unclassifiable and myelodysplastic syndrome with isolated del(5q).


Assuntos
Síndromes Mielodisplásicas/classificação , América/epidemiologia , Anemia Refratária/classificação , Anemia Refratária/diagnóstico , Anemia Refratária/epidemiologia , Anemia Refratária com Excesso de Blastos/diagnóstico , Anemia Refratária com Excesso de Blastos/epidemiologia , Anemia Sideroblástica/diagnóstico , Anemia Sideroblástica/epidemiologia , França/epidemiologia , Humanos , Janus Quinase 2/genética , Síndromes Mielodisplásicas/diagnóstico , Síndromes Mielodisplásicas/epidemiologia , Transtornos Mieloproliferativos/classificação , Transtornos Mieloproliferativos/diagnóstico , Transtornos Mieloproliferativos/genética , Reino Unido/epidemiologia , Organização Mundial da Saúde
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