Kidney Stones Common in Adult Patients With Horseshoe Kidneys

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Adult patients with horseshoe kidneys have an estimated kidney stone incidence of 59%.
Adult patients with horseshoe kidneys have an estimated kidney stone incidence of 59%.

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.

See more coverage from the National Kidney Foundation Spring Clinical meeting.

Reference

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.

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