Cerebrospinal Fluid Biomarkers in Idiopathic Normal Pressure Hydrocephalus

The diagnosis of idiopathic normal pressure hydrocephalus (iNPH) is still challenging. Alzheimer's disease (AD), along with vascular dementia, the most important differential diagnosis for iNPH, has several potential cerebrospinal fluid (CSF) biomarkers which might help in the selection of patients for shunt treatment. The aim of this study was to compare a battery of CSF biomarkers including well-known AD-related proteins with CSF from patients with suspected iNPH collected from the external lumbar drainage test (ELD). A total of 35 patients with suspected iNPH patients were evaluated with ELD. CSF was collected in the beginning of the test, and the concentrations of total tau, ptau181, Aβ42, NFL, TNF-α, TGFβ1, and VEGF were analysed by ELISA. Twenty-six patients had a positive ELD result—that is, their gait symptoms improved; 9 patients had negative ELD. The levels of all analyzed CSF biomarkers were similar between the groups and none of them predicted the ELD result in these patients. Contrary to expectations lumbar CSF TNF-α concentration was low in iNPH patients

Gender differences in presenting and prodromal stroke symptoms

BACKGROUND AND PURPOSE: Prompt recognition of stroke symptoms is critical to timely treatment and women have increased delay to treatment. Women may be more likely to present with atypical symptoms, but this hypothesis has not been extensively evaluated. METHODS: We examined gender differences in the prevalence of presenting and prodromal stroke symptoms among 1107 consecutive patients hospitalized with neurologist-confirmed acute ischemic stroke. Patient demographics, clinical variables, and stroke symptoms were abstracted from medical records by trained abstractors using standardized forms. Estimates were age-standardized to the age distribution of men and women combined. Presenting symptoms occurred within 24 hours of incident stroke admission; prodromal symptoms occurred \u3eor=24 hours of admission. RESULTS: Women were significantly older (P\u3c0.001), more likely to have cardioembolic stroke (P\u3c0.01), and less likely to receive aspirin (P=0.014) or statins (P\u3c0.001). Thirty-five percent of the sample (n=389) reported prodromal symptoms. Women were more likely to have \u3eor=1 somatic prodromal and presenting symptoms (P=0.03; P=0.008), but did not differ from men on specific somatic symptoms. Women did not differ from men in classic presenting stroke symptoms (P=0.89). CONCLUSIONS: Women did not differ significantly in the prevalence of traditional stroke symptoms but were more likely to have somatic presenting and prodromal symptoms. We found no differences in specific prodromal symptoms, making it difficult to craft a public health message about gender differences in early warning signs of stroke. These results suggest that the focus of stroke prevention education for women should continue to emphasize traditional stroke risk factors