RESUMEN
Objective: In this study, we assess the delivery of congenital pediatric surgical care under Brazil's system of universal health coverage and evaluate differences in delivery between public and private sectors. Methods: A cross-sectional national survey of pediatric surgeons in Brazil was conducted. Participants were asked which of 23 interventions identified through the Disease Control Priorities 3 (Surgical Interventions for Congenital Anomalies) they perform and to report barriers faced while providing surgical care. Responses were weighted by state and stratified by sector (public vs private). Results: A sample of 352 responses was obtained and weighted to represent 1378 practicing pediatric surgeons registered in Brazil during the survey time. 73% spend the majority of their time working in the public sector ('Sistema Único de Saúde' and Foundation hospitals), and most of them also work in the private sector. Generally, Brazilian pediatric surgeons have the expertise to provide thoracic, abdominal, and urologic procedures. Surgeons working mostly in the public sector were more likely to report a lack of access to essential medications (25% vs 9%, p<0.01) and a lack of access to hospital beds for surgical patients (52% vs 32%, p<0.01). Conclusions: Brazilian pediatric surgeons routinely perform thoracic, abdominal, and urologic surgery. Those working in government-financed hospitals face barriers related to infrastructure, which may impact Brazilians who rely on Brazil's universal health coverage system. Policies that support pediatric surgeons working in the public sector may promote the workforce available to provide congenital pediatric surgical care.
RESUMEN
Onboard, real-time, imaging techniques, from the original megavoltage planar imaging devices, to the emerging combined MRI-Linear Accelerators, have brought a huge transformation in the ability to deliver targeted radiation therapies. Each generation of these technologies enables lethal doses of radiation to be delivered to target volumes with progressively more accuracy and thus allows shrinking of necessary geometric margins, leading to reduced toxicities. Alongside these improvements in treatment delivery, advances in medical imaging, e.g., PET, and MRI, have also allowed target volumes themselves to be better defined. The development of functional and molecular imaging is now driving a conceptually larger step transformation to both better understand the cancer target and disease to be treated, as well as how tumors respond to treatment. A biological description of the tumor microenvironment is now accepted as an essential component of how to personalize and adapt treatment. This applies not only to radiation oncology but extends widely in cancer management from surgical oncology planning and interventional radiology, to evaluation of targeted drug delivery efficacy in medical oncology/immunotherapy. Here, we will discuss the role and requirements of functional and metabolic imaging techniques in the context of brain tumors and metastases to reliably provide multi-parametric imaging biomarkers of the tumor microenvironment.