QUESTION: A 36-year-old woman presents to the ED with hemoptysis that began just prior to arrival. She reports generalized fatigue and dark urine over the past 3 months. Her vital signs are within normal limits. Her laboratory studies are notable for a creatinine of 2.3 mg/dL, 3+ blood on urinalysis and a hemoglobin of 9.8 mg/dL. Which of the following is the most likely etiology of this patient’s symptoms?
A. Churg Strauss syndrome
B. Granulomatosis with Polyangiitis
C. Polyarteritis nodosa
D. Systemic sclerosis