MRCP2-2340
A 63-year-old man has been regularly visiting the haematology clinic every six months. During his latest appointment, he complained of a headache, blurred vision, aching bones, and extreme lethargy. His wife reported that he has been very vague at times over the past four weeks and drowsy when he was awake.
Upon examination, he appeared pale with a blood pressure of 125/65 mmHg. He was afebrile, and his respiratory rate was 12 breaths per minute. Cardiovascular, chest, and abdominal examination were unremarkable.
Further investigations revealed a haemoglobin level of 82 g/L (130-180), MCV of 88 fL (80-96), white cell count of 9.0 ×109/L (4-11), and a monoclonal band (IgA kappa) with immune paresis. The IgA kappa level was 76 g/L.
Which of the following treatment options would be best for this patient?