Matthias Klein

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BACKGROUND Diffuse infiltrative low-grade gliomas of the cerebral hemispheres in the adult are a group of tumors with distinct clinical, histological and molecular characteristics, and there are still controversies in management. METHODS The scientific evidence of papers collected from the literature was evaluated and graded according to EFNS guidelines,(More)
Despite antibiotic therapy and supportive intensive care, the morbidity and mortality of pneumococcal meningitis remain unacceptably high. During the last years, reactive oxygen (ROS) and nitrogen species (RNS), and peroxynitrite, were found to be produced in large amounts during pneumococcal meningitis. Although most likely intended to fight the invasive(More)
We determined the factors leading to emergency department (ED) delays in patients with acute stroke. Data were collected prospectively in four Berlin inner-city hospitals by ED documentation, medical records, imaging files and patient interviews. An extended Cox proportional hazards model was fitted to the data. Analyses were performed in 558 patients with(More)
BACKGROUND The chemokine CXCL13 is known to dictate homing and motility of B cells in lymphoid tissue and has been implicated in the formation of ectopic lymphoid tissue in chronic inflammation. Whether it influences B cell trafficking during acute infection, is largely unclear. In previous studies, we showed that (I) CXCL13 levels are markedly increased in(More)
Neutrophilic inflammation, which often persists over days despite appropriate antibiotic therapy, contributes substantially to brain damage in bacterial meningitis. We hypothesized that persistent inflammation is the consequence of a vicious cycle in which inflammation-induced cell injury leads to the release of endogenous danger molecules (e.g. high(More)
BACKGROUND Hearing loss is a frequent long-term complication of pneumococcal meningitis (PM). Its main pathological correlate is damage to the organ of Corti and loss of spiral ganglion neurons. The only current treatment option is cochlear implants which require surviving neurons. Here, we investigated the impact of systemically applied neurotrophin-3(More)
OBJECTIVE We investigated whether crossed legs are a prognostic marker in patients with severe stroke. METHODS In this controlled prospective observational study, we observed patients with severe stroke who crossed their legs during their hospital stay and matched them with randomly selected severe stroke patients who did not cross their legs. The(More)
In patients with acute bacterial meningitis, hearing loss can be transient but is often permanent. The mechanisms underlying meningitis-associated hearing loss are not fully understood. Therefore, we investigated the morphological correlates of hearing loss in a rat model of pneumococcal meningitis. Transcutaneous intracisternal injection of Streptococcus(More)
This paper provides a new explanation why several US states have implemented supermajority requirements for tax increases.We model a dynamic and stochastic OLG economy where individual preferences depend on age and change over time in a systematic way. In this setting, we show that the first population of voters will choose a supermajority rule in order to(More)
Stiff-person syndrome (SPS), a rare neuroimmunological disorder, is characterized by symmetrical rigidity and muscle stiffness, particularly of axial and proximal limb muscles. Progressive encephalomyelitis with rigidity and myoclonus (PERM) is a variant of SPS which includes additional clinical features (e.g. sensory symptoms, brain stem signs and(More)