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尿路结石具有明显的地区性,辽南地区以往被认为是我国结石少发区,但近10多年来有明显增多趋势。尿路结石病人中有一部分结石不能在X线平片上显影,被称为X线(-)结石。因成份不能显影者有尿酸结石、胱氨酸结石等。尿酸结石的发病率在英国只占肾结石的3～5％。而以色列约占18～40％。北京统计纯尿酸结石加上尿酸混合结石占15.1％。辽南纯尿酸结石占17％,加上尿酸混合结石占40％左右。尿酸结石大部分在X线片上不显影,常造成误诊,有的误诊成慢性肾炎达10多
Urinary tract stones have obvious regional, Liaoning Province in the past is considered to be stone less developed areas, but the past 10 years has increased significantly. Some patients with urolithiasis stones can not be developed on X-ray, known as X-ray (-) stones. Due to the ingredients can not be developed uric acid stones, cystine stones. The incidence of uric acid stones in the United Kingdom accounts for only 3 to 5% of kidney stones. Israel accounts for about 18-40%. Beijing statistical pure uric acid stones with uric acid mixed stones accounted for 15.1%. South Liaoning pure uric acid stones accounted for 17%, with uric acid mixed stones accounted for about 40%. Most uric acid stones in the X-ray film is not developed, often resulting in misdiagnosis, and some misdiagnosed as chronic nephritis up to 10