Nephrolithiasis/urolithiasis: The Daily PANCE Blueprint
All of the following renal stones are radiopaque EXCEPT:
A. Calcium oxalate
B. Uric acid
C. Cystine
D. Struvite
E. Calcium phosphate
Answer and topic summary
The answer is B. Uric acid
Uric acid stones are radiolucent on plain radiographs, meaning they do not appear on standard X-rays. They are, however, visible on non-contrast CT scans and occasionally detectable with ultrasound. Uric acid stones form in acidic urine (pH < 5.5) and are associated with conditions like gout, high purine diets, and certain metabolic disorders.
Other stone types, such as calcium oxalate, calcium phosphate, struvite, and cystine, are radiopaque and appear on imaging studies like plain radiographs.
View blueprint lesson
Smarty PANCE Content Blueprint Review:
Covered under ⇒ PANCE Blueprint Genitourinary ⇒
