Anti-GBM/ANCA double-positive crescentic nephritis in an elderly patient presenting with heart failure-like symptoms
Rationale: Anti-glomerular basement membrane (anti-GBM) antibody disease and antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis represent the 2 leading causes of rapidly progressive glomerulonephritis (RPGN). The coexistence of these conditions is rare, typically progresses rapidly, and has a poor prognos...