Résumé
BACKGROUND: Vascular access failure, a major cause of morbidity in hemodialysis (HD) patients, occurs mainly at stenotic endothelium following an acute thrombotic event. Microparticles (MPs) are fragments derived from injured cell membrane and are closely associated with coagulation and vascular inflammatory responses. METHODS: We investigated the relationship between levels of circulating MPs and vascular access patency in HD patients. A total of 82 HD patients and 28 healthy patients were enrolled. We used flow cytometry to measure endothelial MPs (EMPs) identified by CD31+CD42- or CD51+ and platelet-derived MPs (PMPs) identified by CD31+CD42+ in plasma samples of participants. Vascular access patency was defined as an interval from the time of access formation to the time of first access stenosis in each patient. MP counts were compared according to access patent duration. RESULTS: The levels of EMP (both CD31+CD42- and CD51+) and CD31+CD42+PMP were significantly higher in patients than in healthy participants. Levels of CD31+CD42-EMP and CD31+CD42+PMP showed a positive correlation. In nondiabetic HD patients, CD31+CD42-EMPs and CD31+CD42+PMPs were more elevated in the shorter access survival group (access survival or = 4 years). CONCLUSION: Elevated circulating EMP or PMP counts are influenced by end-stage renal disease and increased levels of EMP and PMP may be associated with vascular access failure in HD patients.
Sujets)
Humains , Plaquettes , Membrane cellulaire , Sténose pathologique , Cellules endothéliales , Endothélium , Cytométrie en flux , Défaillance rénale chronique , Plasma sanguin , Dialyse rénaleRésumé
Unclassified type occupies about 5 to 10 percent of all ovarian sex cord stromal tumors. Diagnosis is very difficult and subjective because tumors show insufficient differentiation to ovarian or testicular line or display insufficient findings to diagnose as a gynandroblastoma in spite of divergent differentiation. To our knowledge sixty-two cases have been reported in the pathology literatures as yet. The behavior of this group of tumors has not been adequately studied but is similar to granulose cell tumors or Sertoli-Leydig cell tumors. We present a case of unclassified sex cord-stromal tumor which has been experienced in our hospital with brief review of the literature.
Sujets)
Femelle , Diagnostic , Ovaire , Anatomopathologie , Tumeur à cellules de Sertoli et de Leydig , Tumeurs des cordons sexuels et du stroma gonadiqueRésumé
Pregnancy complicated by aplastic anemia is uncommon condition with the significant morbidity and mortality rates. the main complication to mother is hemorrhage due to thrombocytopenia and sepsis due to leukopenia and mortality rate in pregnancy complicated by aplastic anemia is more than 20%. But it remain controversy whether pregnancy play a pathogenic role in the development of the disease. We experienced a patient with severe aplastic anemia in pregnancy who was treated with supportive transfusion of red blood cells and platelets and so we present it here with brief review of literature.