J Korean Soc Pediatr Nephrol.  2003 Oct;7(2):234-238.

A Case of the Fanconi Syndrome with Nephrocalcinosis

Affiliations
  • 1Department of Pediatrics, College of Medicine, Pusan National University, Busan, Korea. suyung@pusan.ac.kr
  • 2Department of Pediatrics, Sungkyunkwan University, Samsung Medical Center, Masan, Korea.

Abstract

Fanconi syndrome is a generalized functional disorder of the proximal tubule of the kidney and is characterized by aminoaciduria, glycosuria, hyperphosphaturia, dehydration, rickets, and growth failure. Nephrocalcinosis and hypercalciuria are rare manifestations of Fanconi syndrome. There is no case report of Fanconi syndrome complicated with nephrocalcinosis and hypercalciuria in Korea. A 6-year-old boy presented with genu valgum and waddling gaits for about 3 years. There was no family history of renal disease and his physical examination was normal except for genu valgum and corrected cleft lip and palate. Laboratory investigations showed generalized aminoaciduria, glycosuria, hyperphosphaturia, hypercalciuria, and low-molecular weight proteinuria including beta2-microglobulin. Serum 25-OH vitamin D3 was within the normal range, and 1,25-(OH)2 vitamin D3 was elevated. Bilateral renal medullary hyperechogenicity was demonstrated by ultrasonography. Analysis of the CLCN5 gene revealed no mutation. Here we describe a boy with Fanconi syndrome complicated with nephrocalcinosis and discuss the differential diagnosis.

Keyword

Fanconi syndrome; Hypercalciuria; Nephrocalcinosis

MeSH Terms

Child
Cholecalciferol
Cleft Lip
Dehydration
Diagnosis, Differential
Fanconi Syndrome*
Gait
Genu Valgum
Glycosuria
Humans
Hypercalciuria
Hypophosphatemia, Familial
Kidney
Korea
Male
Nephrocalcinosis*
Palate
Physical Examination
Proteinuria
Reference Values
Rickets
Ultrasonography
Cholecalciferol
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