Question 834
{"accessible":false,"alternatives":[{"id":4219,"text":"calcium oxalate +/- calcium phosphate:"},{"id":4220,"text":"cystine"},{"id":4221,"text":"indinavir"},{"id":4222,"text":"struvite (triple phosphate)"},{"id":4223,"text":"uric acid"}],"archived":false,"correctAlternativeId":4221,"explanation":"\u003cp\u003eNinety-nine percent of renal tract calculi are visible on a non-contrast CT. Only a few exceptions exist including indinavir (antiretroviral to treat HIV/AIDS) and pure matrix (protein) stones.\u0026nbsp;\u003c/p\u003e","id":834,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/2641","nextQuestionPath":"/articles/urolithiasis/questions/833","relatedArticles":[{"id":49825,"title":"Renal tract calculi (summary)","link":"/articles/renal-tract-calculi-summary?lang=us"}],"alsoUsedIn":[{"id":178,"kind":"Course","title":"Cases in Radiology: Abdomen - page 178","link":"https://radiopaedia.org/courses/cases-in-radiology-abdomen/pages/178"},{"id":166,"kind":"Course","title":"Abdominal Emergency Radiology Course - page 166","link":"https://radiopaedia.org/courses/abdominal-emergency-radiology-course-online/pages/166"}],"stem":"\u003cp\u003eWhich of the following types of renal calculi are radiolucent on CT (i.e. not obviously hyperdense to surrounding structures)?\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/834"}],"attemptsPercentages":[{"alternativeId":"4223","percentage":24},{"alternativeId":"4221","percentage":40},{"alternativeId":"4220","percentage":20},{"alternativeId":"4219","percentage":9},{"alternativeId":"4222","percentage":8}],"promptToLogin":false,"questionManager":false,"articleId":"urolithiasis"}