Which clinical features strongly suggest ANCA-associated GN (Wegener's granulomatosis)?

Which clinical features strongly suggest ANCA-associated GN (Wegener's granulomatosis)?

• A. Nasal congestion, ulceration, chronic sinusitis, and pulmonary nodules/infiltrates
• B. Weight gain and edema only
• C. Isolated proteinuria
• D. Hyperthyroidism symptoms

Answer: (D)

ANCA-associated GN, such as granulomatosis with polyangiitis, classically presents with both upper airway disease and lung involvement along with kidney inflammation. The nasal congestion, ulceration, and chronic sinusitis reflect granulomatous inflammation of the upper airway, while nodules or infiltrates in the lungs indicate granulomatous and necrotizing lung disease. Together, these features form a characteristic pattern that strongly points to GPA as the cause of glomerulonephritis. Options describing weight gain with edema, isolated proteinuria, or hyperthyroid symptoms don’t capture this distinctive combination of upper airway and pulmonary involvement, so they’re not as suggestive.

ANCA-associated GN, such as granulomatosis with polyangiitis, classically presents with both upper airway disease and lung involvement along with kidney inflammation. The nasal congestion, ulceration, and chronic sinusitis reflect granulomatous inflammation of the upper airway, while nodules or infiltrates in the lungs indicate granulomatous and necrotizing lung disease. Together, these features form a characteristic pattern that strongly points to GPA as the cause of glomerulonephritis. Options describing weight gain with edema, isolated proteinuria, or hyperthyroid symptoms don’t capture this distinctive combination of upper airway and pulmonary involvement, so they’re not as suggestive.