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Abstract BACKGROUND Head computerized tomography (CT) increases the risk of cancer in children and should be carefully prescribed to paediatric patients with head injury. The Pediatric Emergency Care Applied Network (PECARN) validated a rule to identify children at risk of a clinically important traumatic brain injury (TBI) needing a head CT. OBJECTIVES The objective was to evaluate adherence to the PECARN rule as a function of CT overuse (defined as a prescribed CT when not recommended by the rule) and underuse rates (no CT performed when recommended) in two Canadian emergency departments (EDs). DESIGN/METHODS We conducted a retrospective chart review of children under 17 years of age seen in 2016 in a paediatric Level I (site 1) and a general Level II (site 2) trauma center. We reviewed charts to determine the appropriateness of head CT use according to the PECARN rule in a random subset of children presenting with a head trauma. Mandatory inclusion criteria were (1) that the head trauma occurred in the 24 hours prior to arrival to the ED, (2) a GCS over 13 and (3) and at least one sign or symptom of minor TBI. Patients with a special condition that could have influenced the decision to order a head CT were automatically excluded. When a patient did not receive a head CT when recommended by the rule, we reviewed medical records to determine if the patient has returned to the ED after his discharge within the next 30 days. RESULTS 1546 eligible patients younger than 17 years consulted during the study period. Of the 203 randomly selected cases per setting, 16 (7.9%) and 24 (12%) respectively from sites 1 and 2 had a head CT performed. For the younger group (< 2), both overuse and underuse rates were below 3%. For the older group, overuse rates were higher in site 2 (9.3% (95%CI:4.8–17%) vs. 1.2% (95%CI:0.2–6.5%) (P=.03)) and there was no difference in underuse rates (22% (95%CI:6.3–55%) vs 39% (95%CI:18–65%) (P=.65)). For children who did not receive a head CT when recommended, none returned to the ED for a related complication. CONCLUSION Overall, even if there may be slightly more overuse of head CTs in the Level II trauma center, results showed an excellent agreement with the PECARN rule when CT was not recommended. However, results also showed a deviation when CT was recommended, where a higher portion of patients than expected did not receive a head CT. Reasons to explain this behaviour will need further exploration.

The most recent late-onset Alzheimer's disease (LOAD) genome-wide association study revealed genome-wide significant association of two new loci: rs744373 near BIN1 (p = 1.6 × 10 −11 ) and rs597668 near EXOC3L2/BLOC1S3/MARK4 (p = 6.5 × 10 −9 ). We have genotyped these variants in a large (3,287 LOAD, 4,396 controls), independent dataset comprising eleven case-control series from the USA and Europe. We performed meta-analyses of the association of these variants with LOAD and also tested for association using logistic regression adjusted by age-at-diagnosis, gender, and APOE ε4 status. Meta-analysis results showed no evidence of series heterogeneity and logistic regression analysis successfully replicated the association of BIN1 (rs744373) with LOAD with an odds ratio (OR = 1.17, p = 1.1 × 10 −4 ) comparable to that previously reported (OR = 1.15). The variant near EXOC3L2 (rs597668) showed only suggestive association with LOAD (p = 0.09) after correcting for the presence of the APOE ε4 allele. Addition of our follow-up data to the results previously reported increased the strength of evidence for association with BIN1 (11,825 LOAD, 32,570 controls, rs744373 Fisher combined p = 3.8 × 10 −20 ). We also tested for epistatic interaction between these variants and APOE ε4 as well as with the previously replicated LOAD GWAS genes (CLU: rs11136000, CR1: rs3818361, and PICALM: rs3851179). No significant interactions between these genes were detected. In summary, we provide additional evidence for the variant near BIN1 (rs744373) as a LOAD risk modifier, but our results indicate that the effect of EXOC3L2 independent of APOE ε4 should be studied further.

ABSTRACT Background: MAPT haplotypes are associated with PD, but their association with rapid eye movement sleep behavior disorder is unclear. Objective: To study the role of MAPT variants in rapid eye movement sleep behavior disorder. Methods: Two cohorts were included: (A) PD (n = 600), rapid eye movement sleep behavior disorder (n = 613) patients, and controls (n = 981); (B) dementia with Lewy bodies patients with rapid eye movement sleep behavior disorder (n = 271) and controls (n = 950). MAPT ‐associated variants and the entire coding sequence of MAPT were analyzed. Age‐, sex‐, and ethnicity‐adjusted analyses were performed to examine the association between MAPT , PD, and rapid eye movement sleep behavior disorder. Results: MAPT‐ H2 variants were associated with PD (odds ratios: 0.62‐0.65; P = 0.010‐0.019), but not with rapid eye movement sleep behavior disorder. In PD, the H1 haplotype odds ratio was 1.60 (95% confidence interval: 1.12‐2.28; P = 0.009), and the H2 odds ratio was 0.68 (95% confidence interval: 0.48‐0.96; P = 0.03). The H2/H1 haplotypes were not associated with rapid eye movement sleep behavior disorder. Conclusions: Our results confirm the protective effect of the MAPT ‐H2 haplotype in PD, and define its components. Furthermore, our results suggest that MAPT does not play a major role in rapid eye movement sleep behavior disorder, emphasizing different genetic background than in PD in this locus. © 2018 International Parkinson and Movement Disorder Society

Summary Objective Patient–provider communication has been found to be less patient centred, on average, with patients who are members of stigmatized or minority groups. Obesity is a stigmatized condition, and thus, people with obesity may experience less patient‐centred communication (PCC). The objective of this study was to assess the association between patient body mass index (BMI) and self‐reported quality of PCC experienced over a 12‐month period and whether that relationship differed for men and women. Methods Data collected for the National Cancer Institute's Health Information National Trends Survey were analysed. Respondents who reported a BMI ≥ 18.5 kg/m 2 and indicated having seen a healthcare provider outside of an emergency room in the last 12 months were included. PCC was measured using a validated six‐item scale. Multivariate logistic regression was used to model the odds of reporting PCC greater than the sample median. Results Compared with people with normal weight BMIs, no associations were found between overweight (odds ratio [OR] = 0.84, p = 0.17), class I & II obesity (OR = 0.94, p = 0.68) or class III obesity (OR = 0.86, p = 0.47) and PCC. There was a significant interaction ( p = 0.015) such that for men, but not women, higher BMI was associated with less PCC. Conclusion Unlike evidence that women experience more weight stigma, in the healthcare domain, men may be at elevated risk of experiencing communication influenced by weight stigma.

Arteriovenous malformations (AVMs) are a subset of congenital vascular malformations (CVMs). They comprise abnormal connections between arterial and venous circulation; treatment approaches are dependent on the angioarchitecture of the AVM, specifically the number and arrangement of the feeder arteries and outflow veins. Various imaging modalities can be used to diagnose and plan treatment. Here we will review the use of transarterial approaches to treat AVMs.

Nutcracker syndrome (NS) refers to symptomatic compression of the left renal vein (LRV) between the abdominal aorta and superior mesenteric artery with potential symptoms including hematuria, proteinuria, left flank pain, and renal venous hypertension. No consensus diagnostic criteria exist to guide endovascular treatment. We aimed to evaluate the specificity of LRV compression to NS symptoms through a retrospective study including 33 NS and 103 control patients. The size of the patent lumen at point of compression and normal portions of the LRV were measured for all patients. Multiple logistic regression analyses (MLR) assessing impact of compression, body mass index (BMI), age, and gender on the likelihood of each symptom with NS were obtained. NS patients presented most commonly with abdominal pain (72.7%), followed by hematuria (57.6%), proteinuria (39.4%), and left flank pain (30.3%). These symptoms were more commonly seen than in the control group at 10.6, 11.7, 6.8, and 1.9%, respectively. The degree of LRV compression for NS was 74.5% and 25.2% for controls (p < 0.0001). Higher compression led to more hematuria (p < 0.0013), abdominal pain (p < 0.006), and more proteinuria (p < 0.002). Furthermore, the average BMI of NS patients was 21.4 and 27.2 for controls (p < 0.001) and a low BMI led to more abdominal pain (p < 0.005). These results demonstrate a strong correlation between the degree of LRV compression on imaging in diagnosing NS.

Key PointsINCB040093 was active across lymphoma subtypes, and the addition of itacitinib provided substantial activity in classic Hodgkin lymphoma. INCB040093 ± itacitinib had a manageable safety and tolerability profile; severe hepatic adverse effects were less common with the combination.