Rapidly Progressive Multisystem Autoimmune Disease in an Adolescent Male: A Fatal Case of Overlapping ANCA-Associated Vasculitis and Systemic Lupus Erythematosus Complicated by Acute Kidney Injury and Multiorgan Failure. Bangladesh J Med Sci 2026, 25 (2), 648-654. https://doi.org/10.3329/bjms.v25i2.88759.