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10424 Medicine

A 28-year-old woman presents with a recent episode of coughing up some blood, frequent nosebleeds, and now decreased urine output. A nasal mucosa ulcer was seen on inspection. Her urinalysis is positive for protein and red cells consistent with a GN. The CXR shows two cavitary lesions and her serology is positive for antineutrophil cytoplasmic antibodies (ANCA). Which of the following is the most likely diagnosis?

AWegener's granulomatosis
Bbacterial endocarditis
CGoodpasture's syndrome
Dlupus erythematosus
Medicine
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