Jim, a 72-year-old retired baker, to your rural hospital for inpatient treatment of a urinary tract infection complicated by new onset atrial fibrillation.
Other investigations show that he has a haemoglobin of 108 g/L (normal range 135-180 g/L) and an erythrocyte sedimentation rate of 98 mm/hr (normal range 0-10mm/hr). Red cell indices show a normochromic normocytic anaemia. His serum creatinine is elevated at 210 ?mol/L (normal range 70-120 ?mol/L).
Which one of the following investigations would be most helpful at this time?
• Serum prostate specific antigen
• Serum iron studies
• Urinary Bence-Jones protein
• 24-hour urinary protein