A 33-year-old man comes to the primary care office because of fatigue,
shortness of breath, pallor, and increased respiratory infections for the past six months. Temperature is 37.3°C (99.1°F),
pulse is 86/min, respirations are 20/min, and
blood pressure is 108/68 mmHg. Physical examination shows
scleral icterus. Laboratory tests are obtained, and the results are shown below.
Acidified serum lysis test is positive. Which of the following is a potential complication of this patient’s disease?