A case of Fanconi syndrome whose origin was suspected to be cystinosis

We report a case of 6 year old girl with Fanconi syndrome the origin of which was suspected to be cystinosis. Pathological findings of a renal biopsy showed needle-like materials in the epithelial cells but the cystine content of the white blood cells was normal. Although excessive urinary loss of growth hormone was detected, the height and weight of the patient was normal. Urinary loss of growth hormone did not cause growth retardation in this case.