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Institute
Gentechnik im Klassenzimmer
(2010)
Gerlach zum zweiten Mal in den Rat der Gesundheitsweisen berufen Foto: Institut für Allgemeinmedizin
(2010)
Objectives. To assess interreader agreements and a learning curve between three (senior, junior, and beginner) different experienced musculoskeletal ultrasonographers. Senior served as the imaging "gold standard".
Methods. Clinically dominant joints (finger, shoulder, knee, tibiotalar, and talonavicular) of 15 rheumatoid arthritis (RA) patients were examined by three different experienced ultrasonographers (senior 10 years, junior 10 months, and beginner one month). Each patient's ultrasonographic findings were reported unaware of the other investigators' results. coefficients, percentage agreements, sensitivities, and specificities were calculated.
Results. 120 joints of 15 RA patients were evaluated. Comparing junior's and beginner's results each to the senior's findings, the overall for all examined joints was 0.83 (93%) for junior and 0.43 (76%) for beginner. Regarding the different joints, junior's findings correlate very well with the senior's findings (finger joints: ; shoulder: ; knee: ; tibiotalar joint: ; talonavicular joint: ) while beginner's findings just showed fair to moderate agreements (finger joints: ; shoulder: ; knee: ; tibiotalar joint: ; talonavicular joint: ). In total, beginner's results clearly improved from (agreement of 67%) at baseline to (agreement of 89%) at the end of the evaluation period.
Conclusions. Ultrasonographic evaluation of a ten-month-experienced investigator in comparison to a senior ultrasonographer was of substantial agreement. Agreements between a beginner and a highly experienced ultrasonographer were only fair at the beginning, but during the study including ultrasonographical sessions of 15 RA patients, the beginner clearly improved in musculoskeletal ultrasonography.
Since the introduction of radiological examination techniques, such as an angiographic computed tomography (ACT) and a computed tomographic angiography (CTA), the diagnosis and treatment planning for cerebral aneurysms became quicker and safer. Unfortunately, the state of development of these techniques, and their possible indications and benefits are still today restricted to specialized centers. The objective of this update was to analyze the current scientific evidence about their actual interventional and diagnostic use and identify the individual advantages of each through a literature review and personal experience-based data.
Gene-modified autologous hematopoietic stem cells (HSC) can provide ample clinical benefits to subjects suffering from X-linked chronic granulomatous disease (X-CGD), a rare inherited immunodeficiency characterized by recurrent, often life-threatening bacterial and fungal infections. Here we report on the molecular and cellular events observed in two young adults with X-CGD treated by gene therapy in 2004. After the initial resolution of bacterial and fungal infections, both subjects showed silencing of transgene expression due to methylation of the viral promoter, and myelodysplasia with monosomy 7 as a result of insertional activation of ecotropic viral integration site 1 (EVI1). One subject died from overwhelming sepsis 27 months after gene therapy, whereas a second subject underwent an allogeneic HSC transplantation. Our data show that forced overexpression of EVI1 in human cells disrupts normal centrosome duplication, linking EVI1 activation to the development of genomic instability, monosomy 7 and clonal progression toward myelodysplasia.