A 49-year-old woman comes to the physician for a 1-week history of red urine and generalized joint pain. There is a small, painful ulcer within her oral cavity. A renal biopsy is shown. Complement protein analysis shows decreased serum C1q and C3. Which of the following is most likely to be seen in this patient?
Decreased potassium secretion
Increased glomerular filtration rate
Increased pulmonary capillary wedge pressure
Reactive granulocytosis
Thrombocytopenia
