Spontaneous rupture of the liver associated with a primary angiosarcoma: case report

A case of fatal spontaneous rupture of the liver caused by primary angiosarcoma is described. Spontaneous rupture of the liver is a rare clinical and pathological entity associated with high morbidity and mortality rates. Possible causes include infections such as hydatid disease, infiltrating conditions such as amyloidosis, inflammatory disorders such as the vasculitides, malignant and benign tumors, and tumorlike conditions. As in the case presented, the finding of a ruptured liver raises the possibility of blunt abdominal trauma, and the circumstances and scene should be assessed. The possibility of terminal resuscitation attempts should also be considered as a possible cause.     

Hypotensive hemorrhagic necrosis in basal ganglia and brainstem

Hypotensive hemorrhagic necrosis of the basal ganglia and brainstem has only occasionally been described. Three such cases are reported. Cardiac arrest had occurred in all cases, and it took at least 1 hour to restore adequate circulation. The patients remained comatose for 2 days to 2 weeks until death. Persistent hypotension causing ischemia in the distribution of deep perforating arteries is considered to have been the key underlying mechanism. Hemorrhage is thought to have been caused by extravasation of red blood cells through damaged blood vessels.     

Making Choices: Adoption Seekers’ Preferences and Available Children with Special Needs

Most children available from public adoption agencies are children with special needs, such as disabilities. This pilot study on the child profile preferences of 5830 adults registered with province-wide adoption agency found that those who were most open to considering children with special needs had been formally seeking to adopt for some time and had completed government-required SAFE assessments and training. Most preferred younger children, and half would consider sibling groups. Between 43% to 60% indicated willingness to consider adopting children with degrees of learning disabilities, emotional behavioral disorders, and physical disabilities, although the willing proportion decreased as the level of each disability's specified impact progressed from “mild” to “moderate” to “severe.” Most preferred, among 20 categories of available children's possible exposures and health diagnoses, were past abuse exposures versus diagnosed disabilities or enduring conditions. Possible explanations for these findings and their implications are explored and ideas for further research proposed.     

Spontaneous acute subdural hematoma complicating arachnoid cyst

The overwhelming majority of cases of acute subdural hematoma in the forensic setting occur as a result of head trauma. We report a case of sudden unexpected death in a middle-aged woman with a history of arachnoid cyst who had sudden spontaneous onset of severe headache that was rapidly followed by collapse and death. A postmortem multiple-slice computed tomographic scan showed a large acute subdural hematoma associated with hemorrhage into an arachnoid cyst. Subdural hemorrhage is an uncommon but well-described complication of an arachnoid cyst.     

A Longitudinal Investigation of Cognitive Self-schemas across Adolescent Development

Research in developmental psychology highlights youth’s self-schemas as one possible pathway to improve adolescents’ functioning and promote positive developmental outcomes. Despite this, the trajectory of positive and negative self-schemas is relatively understudied. This study addresses this limitation by empirically examining the trajectory of self-schemas in a community sample of 623 youth (M?=?13.04 years; 54% female; 49% African American, 4% Biracial, 47% European American) who were followed over a seven-year period. Caregivers completed measures of parenting practices, maternal rumination and negative inferential style, and adolescents completed a computerized behavioral task assessing self-schemas (i.e., mental frameworks that guide attention, interpretation, and memory of one’s experiences). Multilevel growth curve modeling results demonstrated a quadratic slope for negative self-schemas and no mean-level change for positive self-schemas. These trajectories did not vary by gender or racial group. However, parenting factors differentially influenced the trajectories. Specifically, higher levels of parental involvement at baseline, or an active interest and engagement in a child’s experiences and activities, related to lower levels of negative self-schemas during adolescence. Additionally, higher levels of parental rumination and parental negative control at baseline related to lower levels of youth positive self-schemas at baseline. These findings contribute to models of youth cognitive development.

     

What’s in a poll? Incentives for truthful reporting in pre-election opinion surveys

We examine the ability of pre-election polls to aggregate information about voter preferences. We show that if the electorate is small and voting costs are negligible, then an equilibrium exists in which citizens report their true political preferences. If the electorate is large or voting costs are significant, however, then no such equilibrium exists because poll respondents possess incentives to influence the voting behavior of others by misreporting their true preferences. We find that when a truthful equilibrium does exist, a poll can raise expected welfare by discouraging turnout among members of the minority.     

Site, type, and local mechanism of tibial shaft fracture in drivers in frontal automobile crashes

The location, type, and local mechanism of tibial shaft fracture were determined for 66 drivers injured in frontal automobile crashes. The results from the analyses showed that the distal third is the most common fracture location (p<0.05) and that bending is responsible for the majority of these fractures regardless of the fracture site. These findings indicate that the current injury criterion for predicting the occurrence of tibial shaft fracture in crash tests with anthropometric test devices is appropriate in terms of accounting for the primary mechanism of fracture but that increased protective effectiveness could be achieved by redefining the criterion for the distal third shaft section instead of the currently specified mid-shaft section of the tibia.     

A plea for thresholds, i.e., maximal allowed levels for prohibited substances, to prevent questionable doping convictions

With the development of highly sensitive drug testing technologies that can detect a minute quantity of a prohibited substance in an athlete's body, accidental contamination through contact with publicly circulated materials can more readily result in a "positive" reading. To discharge the burden of a positive finding, the athlete must show the "factual circumstances" in which the prohibited substance entered his/her system. In cases of accidental contamination, the athlete generally cannot even know how it occurred, as there are many known and unknown possible sources of contamination. When an athlete does give an account, it cannot generally be proven or disproven. Outside the realm of sports anti-doping, the use of scientifically established thresholds for drug testing is standard practice. Basic logic dictates that thresholds would enable one to differentiate between relevant and irrelevant amounts in the context of a possible sports doping offence. Such a threshold should be functionally motivated, i.e., enable the differentiation between relevant and irrelevant quantities in the context of a possible doping offence, rather than based on instrument performance limits.