More frequent and extreme heat waves threaten climate-sensitive species. Structurally complex, older forests can buffer these effects by creating cool microclimates, although the mechanisms by which ...forest refugia mitigate physiological responses to heat exposure and subsequent population-level consequences remain relatively unexplored. We leveraged fine-scale movement data, doubly labeled water, and two decades of demographic data for the California spotted owl (
Strix occidentalis occidentalis
) to (1) assess the role of older forest characteristics as potential energetic buffers for individuals and (2) examine the subsequent value of older forests as refugia for a core population in the Sierra Nevada and a periphery population in the San Bernardino Mountains. Individuals spent less energy moving during warmer sampling periods and the presence of tall canopies facilitated energetic conservation during daytime roosting activities. In the core population, where tall-canopied forest was prevalent, temperature anomalies did not affect territory occupancy dynamics as warmer sites were both less likely to go extinct and less likely to become colonized, suggesting a trade-off between foraging opportunities and temperature exposure. In the peripheral population, sites were more likely to become unoccupied following warm summers, presumably because of less prevalent older forest conditions. While individuals avoided elevated energetic expenditure associated with temperature exposure, behavioral strategies to conserve energy may have diverted time and energy from reproduction or territory defense. Conserving older forests, which are threatened due to fire and drought, may benefit individuals from energetic consequences of exposure to stressful thermal conditions.
We present the heart of a 38-year-old man with paraplegia due to a remote traumatic spinal cord injury. In the 20 years following his injury, he experienced chronic decubitus ulcers, osteomyelitis, ...neurogenic bladder, malnutrition, and urinary tract infections. He was admitted to the hospital with septic shock secondary to multiple decubitus ulcers and osteomyelitis and expired after a two-month hospitalization. At autopsy, there was marked replacement of left ventricle and interventricular septal myocardium by gritty, firm, yellow-white tissue. Microscopic examination demonstrated a remote infarct with marked dystrophic calcification and unexpected amyloid deposition. This example demonstrates the extraordinary extent to which dystrophic calcifications can replace myocardium and highlights multiple potential etiologies of myocardial calcifications. Of note, this is the first report documenting myocardial calcification as a complication of remote, non-iatrogenic trauma. The role of the amyloidosis in the development of calcification is unclear, but a contributory effect cannot be excluded.
While climate change will have significant impacts on terrestrial organisms, microclimates offer potential refugia for vulnerable species when regional conditions become unsuitable and temperatures ...exceed physiological limits. The efficacy of microclimates as buffers to extreme events is determined not only by their availability, but also by the behavioral flexibility of individuals to access these unique environments during stressful periods. We characterized (i) how forest structure and topography shaped microclimates at roost sites used by California spotted owls (Strix occidentalis occidentalis), a climate-vulnerable species, and (ii) how owls outfitted with temperature sensors used microclimates during warm temperature events. Higher elevations, taller canopies, and greater canopy cover promoted cooler maximum temperatures in stands used for roosting. Within those stands, individuals roosted in cooler sites, especially when roosts were in forest stands on warmer slopes. Tall canopies created relatively cooler microclimates when temperatures were hot, and individuals actively used roost sites that minimized increases in operative temperature, suggesting spotted owls have an adaptive capacity to use cooler microclimates. However, roosts at low elevations consistently exceeded physiological thresholds when temperatures were warm, potentially explaining vacancies in low elevation territories with more open forest. For spotted owls to persist in warming environments, conserving tall, closed-canopy forests that promote cooler microclimates for roosting is critical. While a future climate promises heat events that approach and exceed thermal extremes for a suite of canopy-dwelling species, cooler microclimates provided by forest structure and topography could constitute important refugia in a rapidly changing system.
Background and Aims
Studies often rely upon self‐report and biological testing methods for measuring illicit drug use, although evidence for their agreement is limited to specific populations and ...self‐report instruments. We aimed to examine comprehensively the evidence for agreement between self‐reported and biologically measured illicit drug use among all major illicit drug classes, biological indicators, populations and settings.
Methods
We systematically searched peer‐reviewed databases (Medline, Embase and PsycINFO) and grey literature. Included studies reported 2 × 2 table counts or agreement estimates comparing self‐reported and biologically measured use published up to March 2022. With biological results considered to be the reference standard and use of random‐effect regression models, we evaluated pooled estimates for overall agreement (primary outcome), sensitivity, specificity, false omission rates (proportion reporting no use that test positive) and false discovery rates (proportion reporting use that test negative) by drug class, potential consequences attached to self‐report (i.e. work, legal or treatment impacts) and time‐frame of use. Heterogeneity was assessed by inspecting forest plots.
Results
From 7924 studies, we extracted data from 207 eligible studies. Overall agreement ranged from good to excellent (> 0.79). False omission rates were generally low, while false discovery rates varied by setting. Specificity was generally high but sensitivity varied by drug, sample type and setting. Self‐report in clinical trials and situations of no consequences was generally reliable. For urine, recent (i.e. past 1–4 days) self‐report produced lower sensitivity and false discovery rates than past month. Agreement was higher in studies that informed participants biological testing would occur (diagnostic odds ratio = 2.91, 95% confidence interval = 1.25–6.78). The main source of bias was biological assessments (51% studies).
Conclusions
While there are limitations associated with self‐report and biological testing to measure illicit drug use, overall agreement between the two methods is high, suggesting both provide good measures of illicit drug use. Recommended methods of biological testing are more likely to provide reliable measures of recent use if there are problems with self‐disclosure.
This report describes the cytologic features of a recently described MXD4::NUTM1‐rearranged colonic sarcoma metastatic to the midclavicular soft tissue. Thirteen years ago, a 65‐year‐old woman ...presented with a cecal mass and subsequent liver mass. The cecal mass was diagnosed as malignant undifferentiated spindled and epithelioid neoplasm based on morphology and lack of tumor immunoreactivity with a panel of epithelial, smooth muscle, skeletal, melanoma, hematologic, and GIST markers. The liver mass showed morphologic and immunophenotypic similarity to the epithelioid component of the patient's cecal mass, albeit devoid of the spindled component. Fine needle aspiration of the midclavicular soft tissue mass showed singly scattered to clustered epithelioid to rhabdoid tumor cells with centrally to eccentrically located nuclei, prominent nucleoli, and moderate eosinophilic cytoplasm. Immunohistochemical stains performed on the concurrent biopsy showed the tumor cells were positive for NUT and negative for all other additional markers with retained normal expression of SMARCA2 and SMARCA4. Next‐generation sequencing showed the presence of MXD4::NUTM1 gene fusion. Due to the identical cytomorphologic findings with the epithelioid component of the patient's prior cecal and liver masses, the tumor was deemed as consistent with a NUTM1‐rearranged sarcoma. To our knowledge, this case represents the first reported cytologic features of a NUTM1‐rearranged sarcoma on fine needle aspiration. Familiarity with the cytologic features, inclusion of this entity in the differential diagnosis of tumors with epithelioid and/or rhabdoid morphology, and performance of ancillary tests (immunohistochemistry and molecular) will be helpful in arriving at the right diagnosis.
Introduction
Contingency management (CM) is the most effective treatment for reducing methamphetamine use. We sought to understand why CM has not been taken up to manage methamphetamine use disorder ...in Australia.
Methods
Six focus groups (4–8 participants per group) were conducted with health workers from agencies in Australia that provided drug‐related health care to people who use methamphetamine. These agencies had no previous experience delivering CM for substance use. The potential acceptability and feasibility of implementing CM in their services were discussed.
Results
Participants felt that it would be beneficial to have an evidence‐based treatment for methamphetamine use disorder. This sentiment was offset by concerns that CM conflicted with a client‐centred harm‐reduction approach and that it dictated the goal of treatment as abstinence. It was also perceived as potentially coercive and seen to reify the power imbalance in the therapeutic relationship and therefore potentially reinforce stigma. There was also concern about the public's perception and the political acceptability of CM, who would fund CM, and the inequity of providing incentives only to clients with a methamphetamine use disorder. Some concerns could be ameliorated if the goals and structure of CM could be tailored to a client's needs.
Discussion and Conclusions
Many healthcare workers were keen to offer CM as an effective treatment option for people with methamphetamine use disorder, but CM would need to be sufficiently flexible to allow it to be tailored to client needs and implemented in a way that did not adversely impact the therapeutic relationship.
Introduction
Contingency management (CM) is currently the most efficacious treatment for methamphetamine use, yet it is rarely available in routine care. We examined the viewpoints of people who use ...methamphetamine on CM as a potential treatment for methamphetamine use disorder.
Methods
Semi‐structured qualitative interviews with 30 Australians aged 18 years or older who had used methamphetamine at least weekly in the past 6 months.
Results
Participants reported overall positive attitudes towards CM as a potential treatment option for methamphetamine use disorder. However, there was need for greater flexibility in meeting participant treatment goals (e.g., reduced use or complete abstinence), with particular concern about the viability of initiating abstinence, both in terms of the sufficiency of the initial financial incentive and managing withdrawal symptoms. There was strong interest in the use of digital technologies to provide remote CM, particularly around the convenience and flexibility this offered. Despite this, participants remained keen to access adjunctive treatment and support services but stressed that engagement with these additional services should not be mandatory. Marketing of CM will need to address preconceptions about drug‐testing used in abstinence‐based CM being punitive (especially urine testing) and its connotations with criminal justice interventions.
Discussion and Conclusion
Positive attitudes towards CM bode well for potential uptake should CM be made available in routine clinical practice. However, there is a need to adapt CM to ensure it is feasible and attractive to people who are seeking treatment for methamphetamine use disorder.
We present the heart of a 38-year-old man with paraplegia due to a remote traumatic spinal cord injury. In the 20 years following his injury, he experienced chronic decubitus ulcers, osteomyelitis, ...neurogenic bladder, malnutrition, and urinary tract infections. He was admitted to the hospital with septic shock secondary to multiple decubitus ulcers and osteomyelitis and expired after a two-month hospitalization. At autopsy, there was marked replacement of left ventricle and interventricular septal myocardium by gritty, firm, yellow-white tissue. Microscopic examination demonstrated a remote infarct with marked dystrophic calcification and unexpected amyloid deposition. This example demonstrates the extraordinary extent to which dystrophic calcifications can replace myocardium and highlights multiple potential etiologies of myocardial calcifications. Of note, this is the first report documenting myocardial calcification as a complication of remote, non-iatrogenic trauma. The role of the amyloidosis in the development of calcification is unclear, but a contributory effect cannot be excluded.
