Urinary stones are formed due to deposition of calcium salts in the urinary tract. In contrast, parathyroid tumors can cause increased secretion of parathyroid hormone (hyperparathyroidism), resulting in impaired calcium and phosphorus metabolism, decalcification of bone, and enhanced calcium absorption by the intestine and renal tubules, leading to elevated blood calcium. When blood calcium exceeds the renal threshold, urinary calcium excretion increases, and calcium phosphate and calcium oxalate are easily deposited in the urinary system, forming urinary stones and renal calcification, with corresponding clinical manifestations. And it is easy to occur urinary tract infections, leading to kidney function damage, and even uremia.