Abstract Background There is growing interest in global health among medical trainees. Medical schools and residencies are responding to this trend by offering global health opportunities within their programs. Among United States (US) graduating pediatric residents, 40% choose to subspecialize after residency training. There is limited data, however, regarding global health opportunities within traditional post-residency, subspecialty fellowship training programs. The objectives of this study were to explore the availability and type of global health opportunities within Accreditation Council for Graduate Medical Education (ACGME)-accredited pediatric subspecialty fellowship training programs, as noted by their online report, and to document change in these opportunities over time. Methods The authors performed a systematic online review of ACGME-accredited fellowship training programs within a convenience sample of six US pediatric subspecialties. Utilizing two data sources, the American Medical Association-Fellowship and Residency Electronic Interactive Database Access (AMA-FREIDA) and individual program websites, all programs were coded for global health opportunities and opportunity types were stratified into predefined categories. Comparisons were made between 2008 and 2011 using Fisher exact test. All analyses were conducted using SAS Software v. 9.3 (SAS Institute Inc., Cary, NC). Results Of the 355 and 360 programs reviewed in 2008 and 2011 respectively, there was an increase in total number of programs listing global health opportunities on AMA-FREIDA (16% to 23%, p=0.02) and on individual program websites (8% to 16%, p=0.004). Nearly all subspecialties had an increased percentage of programs offering global health opportunities on both data sources; although only critical care experienced a significant increase (p=0.04, AMA-FREIDA). The types of opportunities differed across all subspecialties. Conclusions Global health opportunities among ACGME-accredited pediatric subspecialty fellowship programs are limited, but increasing as noted by their online report. The availability and types of these opportunities differ by pediatric subspecialty.

Lung adenocarcinoma (LUAD) is the most prevalent subtype of lung cancer and presents clinically with a high degree of biological heterogeneity and distinct clinical outcomes. The current paradigm of LUAD etiology posits alveolar epithelial type II (AT2) cells as the primary cell of origin, while the role of AT1 cells in LUAD oncogenesis remains unknown. Here, we examine oncogenic transformation in mouse Gram-domain containing 2 (Gramd2)⁺ AT1 cells via oncogenic KRAS^G12D. Activation of KRAS^G12D in AT1 cells induces multifocal LUAD, primarily of papillary histology. Furthermore, KRT8⁺ intermediate cell states were observed in both AT2- and AT1-derived LUAD, but SCGB3A2⁺, another intermediate cell marker, was primarily associated with AT1 cells, suggesting different mechanisms of tumor evolution. Collectively, our study reveals that Gramd2⁺ AT1 cells can serve as a cell of origin for LUAD and suggests that distinct subtypes of LUAD based on cell of origin be considered in the development of therapeutics.