A 65-year-old woman comes to the physician because of intermittent fatigue, fever, and hematuria over the past 3 weeks. Laboratory studies show:
Serum calcium 12 mg/dL
Serum phosphorus 2.0 mg/dL
Urine blood 2+
Urine protein Negative
Which of the following is the most likely diagnosis?
Goodpasture syndrome
Lupus nephritis
Parathyroid adenoma
Renal cell carcinoma
Wegener granulomatosis
