The frequency of the atypical category ranged Natural Product Library high throughput from 1% to 14% (mean, 5.3%; 95% confidence interval, 4.1%-6.9%). The risk of malignancy associated with an atypical diagnosis ranged from 25% to 100% (mean, 58%; 95% confidence interval, 47%-69%). There was significant heterogeneity noted among the studies (I-squared, 62%; P=.0004). The frequency of the atypical category and its associated risk were found to be correlated only with the frequency of the specimens being positive for malignancy.\n\nCONCLUSIONSThe rate of atypical diagnoses of the pancreas is similar to that of the thyroid but the risk of malignancy is higher. Significant heterogeneity exists among the studies reporting

atypical diagnoses. There is a need for standardization of the reporting and management of atypical diagnoses in EUS-FNA specimens from the pancreas. Cancer (Cancer Cytopathol) 2013;121:620-8. (c) 2013 American Cancer Society.”
“Background and Purpose-In acute stroke, diffusion-weighted imaging (DWI) lesions are commonly considered markers of irreversible ischemia yet can occasionally reverse. However, the extent and clinical correlates of DWI reversal in thrombolyzed patients remain unclear. We assessed the extent of reversible acute DWI lesions

(RADs) and their relationships with clinical outcome in patients thrombolyzed <= 4.5 hours from onset.\n\nMethods-Data were retrospectively analyzed. RAD was defined as an acute DWI lesion not part of a 24-hour DWI lesion as determined voxelwise. Associations with an early neurological improvement DMXAA ic50 (early neurological improvement=Delta National Institutes of Health Stroke Scale >= 8 or National Institutes of Health Stroke Scale <= 2 at 24 hours) or an excellent outcome (modified Rankin Scale <= 1) were assessed in multivariate analyses.\n\nResults-One hundred seventy-six patients were included. The median (interquartile range) time to selleck inhibitor treatment from onset was 150 minutes (120-194). Eighty-nine patients (50%) exhibited visually-detectable RAD irrespective

of its extent. Over the whole population, the median percentage and volume of RAD were 11% (4-36) and 2.4 mL (0.5-8). Subtracting RAD from initial DWI altered perfusion-weighted imaging-DWI classification in 5 of 100 patients (shift from “no mismatch” to “mismatch” profile in all). Percent RAD was significantly greater in patients treated <= 3 hours (P=0.049), without proximal occlusion (P=0.003), and in 24-hour recanalizers (P<0.001). Early neurological improvement was independently associated with percent RAD. This association increased with percent RAD split in quartiles in a “dose-dependent” manner (P for trend=0.01). Excellent outcome was independently associated with percent RAD (P for trend <0.001).\n\nConclusion-DWI reversal was often sizeable in patients treated <= 4.5 hours.