Question 1894
{"accessible":false,"alternatives":[{"id":9406,"text":"calcium oxalate +/- calcium phosphate"},{"id":9407,"text":"cystine"},{"id":9408,"text":"pure calcium phosphate"},{"id":9409,"text":"struvite (triple phosphate)"},{"id":9410,"text":"uric acid"}],"archived":false,"correctAlternativeId":9406,"explanation":"\u003cp\u003eThe composition of urinary tract stones varies widely depending upon metabolic alterations, geography, and presence of infection.\u003c/p\u003e\u003cp\u003eThe composition of urinary tract stones include:\u003c/p\u003e\u003cul\u003e\n\u003cli\u003ecalcium oxalate +/- calcium phosphate: ~75%\u003c/li\u003e\n\u003cli\u003estruvite (triple phosphate): 15%\u003c/li\u003e\n\u003cli\u003epure calcium phosphate: 5-7%\u003c/li\u003e\n\u003cli\u003euric acid: 5-8%\u003c/li\u003e\n\u003cli\u003ecystine: 1%\u003c/li\u003e\n\u003cli\u003elithogenic medications: 1%\u0026nbsp;\u003c/li\u003e\n\u003c/ul\u003e","id":1894,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2641","nextQuestionPath":"/articles/urolithiasis/questions/1472","relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003eWhat is the most common composition of the urinary tract stones?\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/1894"}],"attemptsPercentages":[{"alternativeId":"9410","percentage":2},{"alternativeId":"9406","percentage":95},{"alternativeId":"9407","percentage":1},{"alternativeId":"9409","percentage":1},{"alternativeId":"9408","percentage":1}],"promptToLogin":false,"questionManager":false,"articleId":"urolithiasis"}