查看文章

Discussion

What is the differential diagnosis for this patient’s electrolyte and acid-base disturbances?

The patient’s admission laboratory findings revealed a normal anion gap metabolic acidosis with positive urine anion gap—suggestive of renal tubular acidosis (RTA). The differential diagnosis includes proximal and distal RTA, given this patient’s hypokalemia with renal potassium wasting. Markedly elevated urinary excretion of β2-microglobulin and retinol-binding protein support a