ORLANDO, Fla.—Kidney stones are a common problem among adult patients with horseshoe kidneys, researchers reported at the National Kidney Foundation’s 2017 Spring Clinical Meetings.
The finding is from a meta-analysis that included 6 observational studies with 715 patients with horseshoe kidneys (335 adults and 380 pediatric patients). The estimated incidence of kidney stones in the adult patients was 59%, Aditya S. Pawar, MBBS, and colleagues at Mayo Clinic in Rochester, Minnesota, concluded. The estimated incidence in the pediatric patients was 3%.
The mean age of the adult stone formers was 46.9 years. Within reported studies, 91.5% of the stones in adult patients were calcium based. The composition of these tones was as follows: calcium oxalate, 62.1%; calcium phosphate, 22.6%; mixed calcium oxalate and calcium phosphate, 6.8%; uric acid, 4.3%; struvite, 3.8%; and others (0.4%).
“These findings may impact the prevention and clinical management of kidney stones in patients with horseshoe kidneys,” the investigators concluded.
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Pawar AS, Cheungpasitporn W, Mao MA, Erickson SB. Incidence and type of kidney stones in patients with horseshoe kidneys: A meta-analysis. Poster presented at the National Kidney Foundation’s 2017 Spring Clinical Meetings in Orlando, Florida. Poster 369.