23rd December 2021

A young boy with a history of cystinosis presents with thirst, polyuria and rickets. A urine dipstick reveals high glucose

A young boy with a history of cystinosis presents with thirst, polyuria and rickets. A urine dipstick reveals high glucose. A blood test performed shows hypokalemia, hypophosphatemia, and hyperchloremic non-anion gap metabolic acidosis. What is the likely cause of his presentation?

Select the SINGLE most appropriate option from the list below. Select ONE option only.