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Saudi Journal of Kidney Diseases and Transplantation
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RENAL DATA FROM THE ARAB WORLD Table of Contents   
Year : 2012  |  Volume : 23  |  Issue : 2  |  Page : 385-390
Primary hyperoxaluria type 1 in Tunisian children


1 Department of Pediatric Nephrology, Charles Nicolle Hospital, Tunis, Tunisia
2 Deparment of Pediatric Surgery, Habib Thameur Hospital, Tunis, Tunisia
3 Department of Clinical Biochemistry, Charles Nicolle Hospital, Tunis, Tunisia

Correspondence Address:
Tahar Gargah
Department of Pediatric Nephrology, Charles Nicolle Hospital, Boulevard 9 Avril, Bab Saadoun, Tunis 1007
Tunisia
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PMID: 22382246

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To determine the clinical, biological, and radiological futures of primary hyper-oxaluria type 1 in Tunisian children, we retrospectively studied 44 children with primary hyper-oxaluria type 1 who were treated in our center from 1995 to 2009. The diagnosis was established by quantitative urinary oxalate excretion. In patients with renal impairment, the diagnosis was made by infrared spectroscopy of stones or kidney biopsies. The male-to-female ratio was 1:2. The median age at diagnosis was 5.75 years. About 43% of the patients were diagnosed before the age of five years with initial symptoms dominated by uremia. Four patients were asymptomatic and diagnosed by sibling screenings of known patients. Nephrocalcinosis was present in all the patients; it was cortical in 34%, medullary in 32%, and global in 34%. At diagnosis, 12 (27%) children were in end-stage renal disease. Pyridoxine response, which is defined by a reduction in urine oxalate excretion of 60% or more, was obtained in 27% of the cases. In the majority of patients, the clinical expression of primary hyperoxaluria type 1 was characterized by nephrocal-cinosis, urolithiasis, and renal failure; pyridoxine sensitivity was associated with better outcome.


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