English: What are kidney stones? Kidney stones form when certain particles in the urine precipitate out and crystallize. Calcium oxalate stones are most common, but there're also uric acid stones, struvite stones, and other less common stones.

Sources: Pathophysiology (Copstead), 5th Ed. Pathoma https://en.wikipedia.org/wiki/Hyperuricosuria http://emedicine.medscape.com/article/437096-overview#a4 http://emedicine.medscape.com/article/983759-overview?pa=mHkSHsMAn4BUDmp1GR5wZUSCN%2BIU9l2uAlb5Gq0bCDJDTGblqxPef0hGC7ukEdbt1dOnZzCQ2omtM3%2BmeMtUTc5tQIqSBXMeLFS1IOzvhsM%3D#a5 http://emedicine.medscape.com/article/439127-overview#a8 http://www.uptodate.com/contents/uric-acid-balance https://en.wikipedia.org/wiki/Purine https://en.wikipedia.org/wiki/Struvite https://radiopaedia.org/articles/jackstone-calculus

https://radiopaedia.org/cases/mid-ureteric-calculus