Resumen: Consenso internacional para la nomenclatura y clasificación de la válvula aórtica bicúspide congénita y su aortopatía, con fines clínicos, quirúrgicos, intervencionistas y de investigación / Summary: International consensus statement on nomenclature and classification of the congenital bicuspid aortic valve and its aortopathy, for clinical, surgical, interventional and research purposes

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Abstract This consensus of nomenclature and classification for congenital bicuspid aortic valve and its aortopathy is evidence-based and intended for universal use by physicians (both pediatricians and adults), echocardiographers, advanced cardiovascular imaging specialists, interventional cardiologists, cardiovascular surgeons, pathologists, geneticists, and researchers spanning these areas of clinical and basic research. In addition, as long as new key and reference research is available, this international consensus may be subject to change based on evidence-based data1.

[Summary: International consensus statement on nomenclature and classification of the congenital bicuspid aortic valve and its aortopathy, for clinical, surgical, interventional and research purposes]. / Resumen: Consenso internacional para la nomenclatura y clasificación de la válvula aórtica bicúspide congénita y su aortopatía, con fines clínicos, quirúrgicos, intervencionistas y de investigación.

This consensus of nomenclature and classification for congenital bicuspid aortic valve and its aortopathy is evidence-based and intended for universal use by physicians (both pediatricians and adults), echocardiographers, advanced cardiovascular imaging specialists, interventional cardiologists, cardiovascular surgeons, pathologists, geneticists, and researchers spanning these areas of clinical and basic research. In addition, as long as new key and reference research is available, this international consensus may be subject to change based on evidence-based data1.

Este consenso de nomenclatura y clasificación para la válvula aórtica bicúspide congénita y su aortopatía está basado en la evidencia y destinado a ser utilizado universalmente por médicos (tanto pediatras como de adultos), médicos ecocardiografistas, especialistas en imágenes avanzadas cardiovasculares, cardiólogos intervencionistas, cirujanos cardiovasculares, patólogos, genetistas e investigadores que abarcan estas áreas de investigación clínica y básica. Siempre y cuando se disponga de nueva investigación clave y de referencia, este consenso internacional puede estar sujeto a cambios de acuerdo con datos basados en la evidencia1.

Childhood Leukemia Survival in the US-Mexico Border: Building Sustainable Leukemia Care Using Health Systems Strengthening Models.

PURPOSE: Pediatric leukemia outcomes are poor in most low- and middle-income countries (LMICs) and exacerbated by health care systems ill equipped to manage cancer. Effective leukemia management in LMICs involves curating epidemiologic data; providing health care workforce specialty training; developing evidence-based treatments and supportive care programs; safeguarding access to medications and equipment; providing patient and family psychosocial, financial, and nutritional support; partnering with nongovernmental organizations, and ensuring treatment adherence. METHODS: In 2013, through a partnership between North-American and Mexican institutions, we used the WHO Framework for Action, a health systems strengthening model to implement a leukemia care sustainable program aimed at improving acute lymphoblastic leukemia (ALL) outcomes at a public hospital in Mexico. We prospectively assessed clinical features, risk classification, and survival outcomes in children with ALL at Hospital General-Tijuana from 2008 to 2012 (preimplementation) and from 2013 to 2017 (postimplementation). We also evaluated program sustainability indicators. RESULTS: Our approach led to a fully-staffed leukemia service, sustainable training programs, evidence-based and data-driven projects to improve clinical outcomes, and funding for medications, supplies, and personnel through local partnerships. Preimplementation and postimplementation 5-year overall survival for the entire cohort of children with ALL, children with standard-risk ALL, and children with high-risk ALL improved from 59% to 65% (P = .023), 73% to 100% (P < .001), and 48% to 55% (P = .031), respectively. All sustainability indicators improved between 2013 and 2017. CONCLUSION: Using the health systems strengthening WHO Framework for Action model, we improved leukemia care and survival in a public hospital in Mexico across the US-Mexico border. We provide a model for the development of similar programs in LMICs to sustainably improve leukemia and other cancer outcomes.

Improving Pediatric Neuro-Oncology Survival Disparities in the United States-Mexico Border Region: A Cross-Border Initiative Between San Diego, California, and Tijuana, Mexico.

PURPOSE: Treatment of children with CNS tumors (CNSTs) demands a complex, interdisciplinary approach that is rarely available in low- and middle-income countries. We established the Cross-Border Neuro-Oncology Program (CBNP) between Rady Children's Hospital, San Diego (RCHSD), and Hospital General, Tijuana (HGT), Mexico, to provide access to neuro-oncology care, including neurosurgic services, for children with CNSTs diagnosed at HGT. Our purpose was to assess the feasibility of the CBNP across the United States-Mexico border and improve survival for children with CNSTs at HGT by implementing the CBNP. PATIENTS AND METHODS: We prospectively assessed clinicopathologic profiles, the extent of resection, progression-free survival, and overall survival (OS) in children with CNSTs at HGT from 2010 to 2017. RESULTS: Sixty patients with CNSTs participated in the CBNP during the study period. The most common diagnoses were low-grade glioma (24.5%) and medulloblastoma (22.4%). Of patients who were eligible for surgery, 49 underwent resection at RCHSD and returned to HGT for collaborative management. Gross total resection was achieved in 78% of cases at RCHSD compared with 0% at HGT (P < .001) and was a predictor of 5-year OS (hazard ratio, 0.250; 95% CI, 0.067 to 0.934; P = .024). Five-year OS improved from 0% before 2010 to 52% in 2017. CONCLUSION: The CBNP facilitated access to complex neuro-oncology care for underserved children in Mexico through binational exchanges of resources and expertise. Survival for patients in the CBNP dramatically improved. Gross total resection at RCHSD was associated with higher OS, highlighting the critical role of experienced neurosurgeons in the treatment of CNSTs. The CBNP model offers an attractive alternative for children with CNSTs in low- and middle-income countries who require complex neuro-oncology care, particularly those in close proximity to institutions in high-income countries with extensive neuro-oncology expertise.

Medulloblastoma With Extensive Nodularity: Tailored Therapy in a Low-resource Setting.

Treatment for medulloblastoma carries significant risks, particularly in resource-constrained settings. We report a case of a Mexican infant with desmoplastic/nodular medulloblastoma. Given the nature of her tumor, we developed a tailored regimen following subtotal resection to avoid both radiation therapy and the high-dose cisplatin therapy offered at most centers in the United States. The patient is in remission 4 years after the initial diagnosis. This case suggests an alternative treatment plan for this particular tumor variant that accommodates the limited resources of many centers around the world and avoids the risks associated with radiation therapy at a young age.

The evolution of coexistence: Reciprocal adaptation promotes the assembly of a simple community.

Species coexistence may result by chance when co-occurring species do not strongly interact or it may be an evolutionary outcome of strongly interacting species adapting to each other. Although patterns like character displacement indicate that coexistence has often been an evolutionary outcome, it is unclear how often the evolution of coexistence represents adaptation in only one species or reciprocal adaptation among all interacting species. Here, we demonstrate a strong role for evolution in the coexistence of guppies and killifish in Trinidadian streams. We experimentally recreated the temporal stages in the invasion and establishment of guppies into communities that previously contained only killifish. We combined demographic responses of guppies and killifish with a size-based integral projection model to calculate the fitness of the phenotypes of each species in each of the stages of community assembly. We show that guppies from locally adapted populations that are sympatric with killifish have higher fitness when paired with killifish than guppies from allopatric populations. This elevated fitness involves effects traceable to both guppy and killifish evolution. We discuss the implications of our results to the study of species coexistence and how it may be mediated through eco-evolutionary feedbacks.

Addressing regional disparities in pediatric oncology: Results of a collaborative initiative across the Mexican-North American border.

BACKGROUND: Cancer is emerging as a major cause of childhood mortality in low- and middle-income countries. In Mexico, cancer is the number one cause of death in children aged 5-14. Until recently, many children with cancer from Baja California, Mexico, went untreated. We reasoned that an initiative inspired by the St. Jude Children's Research Hospital (SJCRH) "twinning" model could successfully be applied to the San Diego-Tijuana border region. In 2008, a twinning project was initiated by Rady Children's Hospital, SJCRH, and the General Hospital Tijuana (GHT). Our aim was to establish a pediatric oncology unit in a culturally sensitive manner, adapted to the local healthcare system. PROCEDURE: An initial assessment revealed that despite existence of basic hospital infrastructure at the GHT, the essential elements of a pediatric cancer unit were lacking, including dedicated space, trained staff, and uniform treatment. A 5-year action plan was designed to offer training, support the staff financially, and improve the infrastructure. RESULTS: After 7 years, accomplishments include the opening of a new inpatient unit with updated technology, fully trained staff, and a dedicated, interdisciplinary team. Over 700 children have benefited from accurate diagnosis and treatment. CONCLUSIONS: Initiatives that implement long-term partnerships between institutions along the Mexican-North American border can be highly effective in establishing successful pediatric cancer control programs. The geographic proximity facilitated accelerated training and close monitoring of project development. Similar initiatives across other disciplines may benefit additional patients and synergize with pediatric oncology programs to reduce health disparities in underserved areas.

Improving Pediatric Cancer Care Disparities Across the United States-Mexico Border: Lessons Learned from a Transcultural Partnership between San Diego and Tijuana.

In 2007, the 5-year survival rate for children with acute leukemia in Baja California, Mexico was estimated at 10% (vs. 88% in the United States). In response, stakeholders at St. Jude Children's Research Hospital, Rady Children's Hospital San Diego, and the Hospital General de Tijuana (HGT) implemented a transcultural partnership to establish a pediatric oncology program. The aim was to improve clinical outcomes and overall survival for children in Baja California. An initial needs assessment evaluation was performed and a culturally sensitive, comprehensive, 5-year plan was designed and implemented. After six years, healthcare system accomplishments include the establishment of a fully functional pediatric oncology unit with 60 new healthcare providers (vs. five in 2007). Patient outcome improvements include a rise in 5-year survival for leukemia from 10 to 43%, a rise in new cases diagnosed per year from 21 to 70, a reduction in the treatment abandonment rate from 10% to 2%, and a 45% decrease in the infection rate. More than 600 patients have benefited from this program. Knowledge sharing has taken place between teams at the HGT and Rady Children's Hospital San Diego. Further, one of the most significant outcomes is that the HGT has transitioned into a regional referral center and now mentors other hospitals in Mexico. Our results show that collaborative initiatives that implement long-term partnerships along the United States-Mexico border can effectively build local capacity and reduce the survival gap between children with cancer in the two nations. Long-term collaborative partnerships should be encouraged across other disciplines in medicine to further reduce health disparities across the United States-Mexico border.

Pediatric reference intervals for uncommon bleeding and thrombotic disorders.

This study provides pediatric reference intervals and median values for factors II, V, VII, X, fibrinogen, alpha-2-antiplasmin (AP), antithrombin (AT), plasminogen, protein C (PC), and protein S (PS) for children 7 to 17 years of age. All analytes exhibited at least some age dependence in late childhood and adolescence either when compared against adult values or when medians for children were regressed against age.

Colapso pelo calor esforço induzido: reconhecimento para salvar vidas e tratamento imediato em instalações atléticas / Exertional heat stroke: life-saving recognition and onsite treatment in athletic settings

O prognóstico do colapso pelo calor esforço induzido depende do produto do tempo de duração em que a temperatura central ficou elevada e do grau da elevação. O atleta com EHS que tem pronta descoberta e que é resfriado de maneira eficiente, muito provavelmente irá sobreviver ao episódio com pouco ou nenhum efeito residual. Em contraste, o atleta com apresentação atrasada para o tratamento, especialmente se a área sob a curva de resfriamento for > 60 graus-minuto (centígrados) terá um curso complicado e geralmente fatal. Os métodos de condução do resfriamento com imersão em gelo ou água gelada ou envolvimento em toalhas com água gelada proporcionarão uma rápida e consistente redução da temperatura de todo o corpo, que irá salvar tanto os órgãos quanto a vida. O reconhecimento depende em alto grau da suspeita por parte dos próprios atletas, treinadores e pessoal médico local. Em condições de alto risco, os atletas devem se supervisionar, procurando por mudanças sutis que podem ser sinais de EHS.(AU)The prognosis for exertional heat stroke depends upon the product of length of time the core temperature is elevated and the degree of elevation. The athlete with EHS who is discovered promptly and efficiently cooled will most likely survive the episode with little if any residual. In contrast, the athlete who has delayed presentation for treatment, especially if the area under to cooling curve is > 60 degree-minutes (centigrade), will have a complicated and often fatal course. Conductive cooling methods with ice or cool water immersion or rotating ice water cooled towels provide rapid and consistent whole body temperature reduction that is both organ and life saving. Recognition depends on a high index of suspicion on the part of athletes, coaches, and onsite medical personnel. In high risk conditions, athletes should "buddy up" to watch for subtle changes that can signal the onset of EHS.(AU)El pronóstico del choque térmico (CT) relacionado con el ejercicio depende...

Lifestyle-only intervention attenuates the inflammatory state associated with obesity: a randomized controlled study in adolescents.

OBJECTIVES: The primary goals were to understand the relationship among the inflammatory factors, C-reactive protein (CRP), interleukin-6 (IL-6), and fibrinogen, and indices of obesity in normoglycemic, insulin-resistant adolescents and to investigate the impact of a lifestyle-only intervention on these nontraditional risk factors for cardiovascular disease (CVD). STUDY DESIGN: Randomized controlled lifestyle-only intervention study in adolescents. Of the 21 adolescents studied, 15 obese subjects (body mass index [BMI] = 37.6 +/- 3.3 kg/m 2 ) were randomized to either a lifestyle intervention program or usual care. The lean controls were studied only at baseline. Analysis of variance (ANOVA) for repeated measures was used to study intervention effect and t test, one-way ANOVA, and discriminant function analysis for baseline comparisons. RESULTS: The intervention group maintained weight, whereas the control group gained weight (P = .02). A redistribution of body composition and a decrease in insulin resistance were observed. Elevated circulating concentrations of CRP, fibrinogen, and IL-6 were significantly reduced (all P