Vasculitis Quiz: Ace Your Exams

Get ready to dominate your medical and nursing exams by using our dynamic quizzes to elevate your knowledge and increase your confidence. Whether you're gearing up for the USMLE®, COMLEX®, or your next in-class assessment, Osmosis quizzes tackle key topics in pathology, diagnostics, and treatment approaches. By honing in on clinical readiness and decision-making, we make sure the knowledge you gain empowers you both in the classroom and in real-world practice. Jump in and supercharge your exam prep!

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A 40-year-old man comes to the clinic due to fatigue, cough and episodic blood in his urine during the past 6 months. He states he “hasn’t been feeling like myself lately.” Over the past 2 months, he has had a chronic cough which he attributed to an upper respiratory infection. His medical history is insignificant, and he does not smoke or use illicit drugs. On physical examination, wheezing is heard diffusely over the lung fields. Examination of the lower extremities reveals diffuse palpable purpura. Laboratory studies are obtained and shown below:  
 
 Laboratory value  Result 
 Serum 
 Antineutrophil cytoplasmic antibody (ANCA)  Positive 
 Urine  
 Protein   2.5 g/24-hr 
 Creatinine  1.9 mg/dL 
 Erythrocytes  10/hpf 
 
Arterial biopsy of an affected region reveals focal transmural necrotizing lesions without granulomatous inflammation. Which of the following is the most likely diagnosis? 

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