MRCP2-3963

MRCP2-3963

A 50-year-old man, previously healthy and active, presents to the emergency department with a six-week history of back pain, malaise, and hiccups. He experienced an episode of hematuria three days prior to admission and has no history of respiratory symptoms. On examination, he appears unwell with a pulse of 120, BP 105/80 mmHg, temperature 36.7°C, and oxygen saturation of 95% on air. Laboratory investigations reveal low hemoglobin levels, normal white cell count, low sodium levels, high potassium levels, high urea levels, high creatinine levels, and low pH levels. His ECG shows marked tenting of the T waves. He is urgently transferred for dialysis and further investigations. A chest x-ray shows no signs of heart failure or consolidation. His urine dip is positive for protein and blood only. An ultrasound of the renal tract is normal, but a renal biopsy reveals acute glomerulonephritis with linear immunofluorescence staining. He tests positive for antiglomerular basement membrane antibody, and a diagnosis of Goodpasture’s disease is made. Besides hemodialysis, what other therapeutic modality is likely to be beneficial in the next few days?