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81.
Intravascular tumors: transvenous biopsy 总被引:1,自引:0,他引:1
A technique is described for transfemoral biopsy of intravenous tumors. Positive results were obtained at biopsy in three patients who had an intraluminal mass in the inferior vena cava and in one patient with a mass in the iliac vein. Transvenous biopsy is helpful in obtaining a histologic diagnosis and provides an alternative method to surgery or percutaneous transabdominal needle biopsy. 相似文献
82.
A healthy girl of 10 years presented with lumps on her tongue, shown on biopsy to be neuromas. She had had operations to her feet for pes cavus and was relatively long-limbed but had no other 'Marfanoid' features. She had a high plasma calcitonin level. At operation a normal sized thyroid gland was totally removed. It contained two discrete masses of malignant C-cells and diffuse foci elsewhere. The plasma calcitonin fell slowly to normal on follow-up but was noted to be rising 2 1/2 years later. We stress the importance of making this diagnosis as early as possible and mention briefly another child aged 15 months, similarly diagnosed and operated upon. 相似文献
83.
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85.
SNAP-25 deficit and hippocampal connectivity in schizophrenia 总被引:3,自引:2,他引:1
Young CE; Arima K; Xie J; Hu L; Beach TG; Falkai P; Honer WG 《Cerebral cortex (New York, N.Y. : 1991)》1998,8(3):261-268
Regional abnormalities of brain connectivity may be an important substrate
for the expression of schizophrenia, a severe form of mental illness. Brain
imaging and postmortem morphometric studies indicate hippocampal structure
is abnormal in schizophrenia. To study molecular components of hippocampal
connectivity the presynaptic proteins SNAP-25 and synaptophysin were
assayed in postmortem samples. Immunocytochemical studies indicated reduced
SNAP-25 immunoreactivity in schizophrenia compared to controls,
particularly in the terminal fields of entorhinal cortex projections.
Although there were no overall changes in synaptophysin immunoreactivity,
in the granule cell layer of the dentate gyrus synaptophysin
immunoreactivity was increased in schizophrenia. These results indicate
that disconnection of a subset of hippocampal circuitry from the entorhinal
cortex, as well as intrinsic changes in hippocampal connectivity, may
contribute to the mechanism of illness in schizophrenia.
相似文献
86.
MP Busch ; EA Operskalski ; JW Mosley ; CE Stevens ; ER Schiff ; SH Kleinman ; H Lee ; M Lee ; M Harris 《Transfusion》1994,34(10):858-864
BACKGROUND: The long-term course of human immunodeficiency virus type 1 (HIV-1)-related disease among seropositive blood donors has not been described. The enrollment and epidemiologic background of HIV-1- infected donors in the Transfusion Safety Study and their immunologic and clinical progression are described. STUDY DESIGN AND METHODS: Through the testing of approximately 200,000 sera from donations made in late 1984 and early 1985, 146 anti-HIV-1-positive donors and 151 uninfected matched donors were enrolled. These two cohorts were followed with 6-month interval histories and laboratory testing. RESULTS: Seropositive donors detected before the institution of routine anti-HIV-1 screening disproportionately were first-time donors and men with exclusively male sexual contacts. The actuarial probability of a person's developing AIDS within 7 years after donation was 40 percent; the probability of a person's dying of AIDS was 28 percent. AIDS developed more often when the donor was p24 antigen-positive at donation. Over a 3-year period, significant decreases occurred in CD4+, CD2+CD26+, CD4+CD29+, and CD20+CD21+ counts, but not in CD8+ subsets, CD20+, or CD14+. CONCLUSION: The high proportions of first-time donations and exclusively homosexual men among seropositive donors suggest that test-seeking may have contributed to the high HIV-1 prevalence in the repository. Implementation of alternative test sites when routine donor screening began in 1985 may have averted many high- risk donations. The disease course in HIV-1-infected donors had the same wide spectrum of immunologic and clinical manifestations as were reported for other cohorts. 相似文献
87.
88.
本研究在于确定胃酸抑制剂是否会增加选择性手术患者术后发生肺炎的风险。
此项人群前瞻性队列研究于1992年4月1日-2008年3月31日在加拿大开展。年龄大于65岁已确定进行选择性手术的患者入组。将本年度在手术前服用过两种或以上胃酸抑制剂的患者以及术前90天内服用过至少一种胃酸抑制剂的患者入试验组, 相似文献
89.
Derwall M Francis RC Kida K Bougaki M Crimi E Adrie C Zapol WM Ichinose F 《Critical care (London, England)》2011,15(1):R51
Introduction
Although inhalation of 80 parts per million (ppm) of hydrogen sulfide (H2S) reduces metabolism in mice, doses higher than 200 ppm of H2S were required to depress metabolism in rats. We therefore hypothesized that higher concentrations of H2S are required to reduce metabolism in larger mammals and humans. To avoid the potential pulmonary toxicity of H2S inhalation at high concentrations, we investigated whether administering H2S via ventilation of an extracorporeal membrane lung (ECML) would provide means to manipulate the metabolic rate in sheep. 相似文献90.
Shaukat A Virnig DJ Salfiti NI Howard DH Sitaraman SV Liff JM 《Digestive diseases and sciences》2011,56(8):2378-2383