A 44-year-old man comes to the physician for a 3-month history of a painless right-sided facial swelling. There is hepatosplenomegaly and a mediastinal mass. Biopsy of the facial swelling confirms the diagnosis. Rituximab is commenced. Which of the following is this patient at greatest risk from as a result of this pharmacologic therapy?
Acute tubular necrosis
Agranulocytosis
Bacterial pneumonia
Cinchonism
Pulmonary fibrosis