Abstract
A 26-year-old woman was referred for recurrent urolithiasis. The first manifestation occurred 3 years before, followed by recurrent acute episodes. She underwent one ureteral stent placement, one shock wave lithotripsy, and at last a flexible ureteroscopy that allowed to retrieve all the remaining stones. She had no other medical history with the exception of paroxysmal tachycardia, poor dairy intake in her diet and did not take any medication interfering with calcium or phosphate homeostasis. Regarding her family history, her mother had also recurrent renal colic due to urolithiasis. Morphoconstitutional analysis revealed a stone made of calcium phosphate and to a lesser extent calcium oxalate, in concentric layers. According to infrared spectra analysis, the stone consisted mainly of calcium phosphate: 56% carbonated apatite, 20% octacalcium phosphate pentahydrate (OCP), 12% calcium oxalate monohydrate, 10% calcium oxalate dihydrate and 2% proteins.
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