NEJM This Week — June 4, 2026

This week, we discuss left atrial appendage closure for atrial fibrillation, oxygen strategies in respiratory failure, an all-oral treatment for acute myeloid leukemia, CAR T-cell therapy enabling kidney transplantation, and a case of a neuroepithelial tumor that developed after gene therapy. We review childhood vaccine hesitancy, follow a complex diagnostic case, and examine Perspectives on corporatization in medicine, famine and war, and the future of health care systems.