RESUMEN
Background: Diffuse intrinsic pontine glioma (DIPG) stands as the predominant type of brainstem glioma. It is characterized by a notably brief median survival period, with the majority of patients experiencing disease progression within six months following radiation therapy. This systematic review and meta-analysis aims to assess the efficacy and safety of hypofractionated radiotherapy (HFRT) compared to conventionally fractionated radiotherapy (CFRT) in DIPG treatment. Materials and methods: A systematic literature search was conducted in four databases, and relevant studies comparing HFRT and CFRT in DIPG were included. Data were extracted and analyzed for overall survival (OS), progression-free survival (PFS), and treatment-related toxicities. Statistical analysis was performed using random-effects models with heterogeneity assessment. Results: Five studies met the inclusion criteria, comprising 518 patients. No significant difference in one-year OS was observed between HFRT and CFRT (29% vs. 22%, p = 0.94). The median OS was similar in both treatment groups (9.7 vs. 9.3 months, p = 0.324). Similarly, no significant difference in one-year PFS was found between HFRT and CFRT (19.8% vs. 16.6%, p = 0.82), with comparable median PFS (9.3 vs. 9.4 months, p = 0.20). In meta-regression analysis, there was no association of chemotherapy (p > 0.05) or radiation biologically effective dose (BED) (p > 0.05) regarding OS or PFS outcomes. There were no significant differences in treatment-related toxicities. Conclusions: HFRT yields one-year OS and PFS rates similar to CFRT in DIPG, with no significant differences in treatment-related toxicities. Chemotherapy and BED did not affect OS or PFS.
RESUMEN
BACKGROUND: Global surgery is an interdisciplinary field that advocates for access to equitable, affordable surgical services for all people. Engaging medical students in the field can strengthen the surgical workforce in low- and middle-income countries. We aim to investigate Brazilian medical students' acknowledgment of global surgery and their preferred learning platforms. MATERIALS AND METHODS: We performed a cross-sectional study through an anonymous Portuguese survey on Google Forms, consisting of 30 mixed multiple-choice and five-point Likert scale questions. Students enrolled in a Brazilian medical school from the second to sixth academic year fulfilled inclusion criteria. The association between qualitative variables was assessed using Chi-square, Fisher's exact test, or binary logistic model. RESULTS: We received 1,345 responses from 208 medical schools. Only 20.9% (282/1,345) of participants reported awareness of global surgery, who were predominantly female. 96.5% (1,298/1,345) declared interest in knowing more about global surgery and participants indicated social media (71.6%, 202/282) as the prevalent manner to gain awareness on it, followed by webinars (63.5%, 179/282). Extracurricular classes were the most preferable option among students (61.4%, 827/1,345) to get acquainted with the field, followed by internships (59.4%, 812/1,345), workshops (57%, 767/1,345), and social media (53.4%, 730/1,345). The main obstacles to pursue a global surgery career were lack of national opportunities (32%, 431/1,345) and adequate training (25.4%, 341/1,345). CONCLUSION: We outlined the most strategic pathways to raising awareness on global surgery among Brazilian medical students, providing relevant insights on its education in similar settings.