Several quantitative magnetic resonance imaging (MRI) techniques have been proposed to investigate microstructural tissue changes in amyotrophic lateral sclerosis (ALS) including diffusion tensor ...imaging (DTI), magnetization transfer imaging, and R2* mapping. Here, in this study, we compared these techniques with regard to their capability for detecting ALS related white matter (WM) changes in the brain and their association with clinical findings. We examined 27 ALS patients and 35 age-matched healthy controls. MRI was performed at 3T, after which we analyzed the diffusion properties, the magnetization transfer ratio (MTR), and the effective transversal relaxation rate R2* in 18 WM tracts that were obtained by a fully automated segmentation technique. ALS patients, especially with a bulbar onset, showed a bilateral increase in radial and mean diffusivity, as well as a reduction in fractional anisotropy of the corticospinal tract (CST), and diffusion changes in the parietal and temporal superior longitudinal fasciculus. A reduction of the MTR was found in both CSTs and an R2* reduction was seen only in the left CST. Tract-specific diffusion properties were not related to clinical status in a cross-sectional manner but demonstrated some association with disease progression over three subsequent months. DTI reveals more widespread WM tissue changes than MTR and R2*. These changes are not restricted to the CST, but affect also other WM tracts (especially in patients with bulbar onset), and are associated with the short term course of the disease.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Background and objectives
Multifocal motor neuropathy (MMN) is a rare neuropathy and detailed descriptions of larger patient cohorts are scarce. The objective of this study was to evaluate ...epidemiological, clinical, and laboratory features of MMN patients and their response to treatment in Austria and to compare these data with those from the literature.
Methods
Anonymized demographic and clinical data about MMN patients until 31.12.2017 were collected from registered Austrian neurologists. Exploratory statistics on clinical and laboratory features as well as treatment regimens and responses were performed.
Results
57 Patients with MMN were identified, resulting in a prevalence of 0.65/100.000. Mean age of onset was 44.1 ± 13.1 years, the diagnostic delay 5.5 ± 8.4 years. In 77% of patients, symptom onset was in the upper limbs, and in 92%, it occurred in distal muscles. Proximal onset was never observed in the lower limbs. At the final follow-up, the majority of patients had atrophy (88%) in affected regions. Definite motor conduction blocks (CB) were found in 54 patients. Anti-GM1-IgM antibodies were present in 43%. Treatment with intravenous immunoglobulins improved muscle strength and INCAT score initially, but at last follow-up, both scores deteriorated to values before treatment.
Discussion
The findings of the present study corroborate the previous findings in MMN. Onset typically occurs in the upper limbs and mostly distal, CBs are found in the majority of cases, while anti-GM1-IgM antibodies are detected in only approximately 40%. Our study underlines that the initial good response to treatment fades over time.
Stroke risk is increased in cancer patients and cancer activity has been claimed to play a role in the development of ischaemic stroke (IS). We wanted to further test these assumptions and to explore ...the impact of such relation on short-term prognosis. We identified all IS patients that were admitted to the neurological department of our primary and tertiary care university hospital between 2008 and 2014 (
n
= 4918) and reviewed their medical records for an additional diagnosis of cancer. Cancer patients were categorized into those with “active cancer” (AC: recurrent malignant tumour, metastases, ongoing chemo-/radiotherapy) and “non-active cancer” (NAC). We compared demographic, clinical and neuroimaging features of both patient groups and assessed their association with in-hospital mortality. 300 IS patients with known cancer were identified (AC:
n
= 73; NAC:
n
= 227). IS patients with AC were significantly younger (70.3 ± 10.6 vs. 74.9 ± 9.9 years), had more severe strokes at admission (NIHSS: median 5 vs. 3), more frequently cryptogenic strokes (50.7 vs. 32.5 %) and more often infarcts in multiple vascular territories of the brain (26 vs. 5.2 %) compared to IS patients with NAC. In-hospital mortality was significantly higher in AC patients (21.9 vs. 6.2 %). Multivariate analysis identified AC (odds ratio OR 3.70, 95 % confidence interval CI 1.50–9.30), NIHSS at admission (OR 1.10, CI 1.10–1.20) and C-reactive protein level (OR 1.01, CI 1.00–1.02) as factors significantly and independently associated with in-hospital death. Our findings support a direct role of AC in the pathogenesis and prognosis of acute IS. This needs to be considered in the management and counselling of such patients.
BACKGROUND AND PURPOSE—Sex-related differences in quality of acute stroke care are an important concern with limited data available, specifically regarding stroke unit (SU) setting. We used the ...prospective nationwide Austrian SU registry to address this issue.
METHODS—Our analysis covered an 8-year time period (January 2005 to December 2012) during which all patients with transient ischemic attack or ischemic stroke admitted to 1 of 35 Austrian SU had been captured in the registry. These data were analyzed for age-adjusted preclinical and clinical characteristics and quality of acute stroke care in men and women. In addition, we assessed the outcome at 3 months in multivariate analysis.
RESULTS—A total of 47 209 individuals (47% women) had received SU care. Women were significantly older (median age77.9 versus 70.3 years), had higher pre-existing disability and more severe strokes. Correcting for age, no significant sex-related differences in quality of care were identified with comparable onset-to-door times, times to and rates of neuroimaging, as well as door-to-needle times and rates of intravenous thrombolysis (14.5% for both sexes). Despite equal acute stroke care and a comparable rate of neurorehabilitation, women had a worse functional outcome at 3-month follow-up (modified Rankin scale 3–5odds ratio, 1.26; 95% confidence interval 1.17–1.36), but a lower mortality (odds ratio, 0.70; 95% confidence interval 0.78–0.88) after correcting for confounders.
CONCLUSIONS—We identified no disproportions in quality of care in the acute SU setting between men and women, but the outcome was significantly different. Further studies on the poststroke period including socioeconomic aspects are needed to clarify this finding.
Stroke has become a treatable condition with increasing evidence of treatment benefits in older people. However, stroke mimics in geriatric patients are especially prevalent, causing incorrect ...suspicion and consecutive burden to patients and emergency room resources. We therefore examined the dimension of this problem by investigating emergency room admissions from nursing homes for suspected stroke.
We performed a retrospective cohort study of all nursing home residents who were admitted to the neurological emergency room of our primary and tertiary care university hospital between 2013 and 2015. Patients were further divided into those with confirmed stroke and stroke mimics after diagnostic stroke work-up.
Of 419 nursing home patients referred to the emergency room, nearly one third had suspected stroke (n = 126; mean age: 78 ± 14 years, polypharmacy rate: 77%). Of those, 43 (34%) had a confirmed stroke (ischaemic: n = 34; haemorrhagic: n = 9) and 83 (66%) had stroke mimics after diagnostic work-up. Only one patient underwent intravenous thrombolysis, followed by mechanical thrombectomy for middle cerebral artery occlusion. Prehospital delay (47%) and multimorbidity-associated contraindications (27%) were the main reasons for withholding recanalization therapy. Among the stroke-mimicking conditions, infectious diseases (24%) and epileptic seizures (20%) were the most frequent. Multivariate analysis identified focal deficits (OR 16.6, 95% CI 4.3-64.0), atrial fibrillation (OR 3.9, 95% CI 1.5-10.5) and previous stroke (OR 3.2, 95% CI 1.2-8.9) as indicators that were associated with stroke.
In our region, nursing home referrals for suspected stroke have a high false positive rate and occur delayed, which most often precludes specific stroke treatment in addition to multimorbidity. Such problems may also exist in other centres and highlight the need for targeted educational and organizational efforts. Simple indicators as identified in this study may help to sort out patients with true stroke more efficiently.
Preterm premature rupture of membranes (PPROM) occurs in up to 3% of all pregnancies. Only few comparative studies have investigated potential risks and benefits between different tocolytic ...substances in women with PPROM. The aim of this study was to compare the neonatal short term outcome after tocolysis with Atosiban or Hexoprenaline in women with PPROM. This is a retrospective observational cohort study of women with PPROM between 24 and 32 weeks of gestation comparing neonatal and maternal outcome after tocolysis with atosiban or hexoprenaline. Outcome parameters were short term neonatal outcome, maternal tocolytic efficacy, effectiveness and tolerability and neonatal neurodevelopmental long-term outcome. Continuous variables were compared using t-Test or Mann–Whitney U test, as appropriate. For categorical variables Chi-square after Pearson and Fisher exact-test were used to compare the two groups. 93 women were included into this study with 42 women receiving hexoprenaline and 51 women receiving atosiban as primary tocolytic treatment. Mean gestational age was 29 weeks in both groups at the time PPROM. No differences were found for any short term neonatal outcome parameters, tocolytic efficacy, effectiveness and tolerability and neonatal neurodevelopmental long-term outcome. Both hexoprenaline and atosiban do not affect the short and long term neonatal outcome in women with PPROM for the time of lung maturation.
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