Editing Kidney stone disease (section)

==== Other types ====
[[File:Cystine Crystals in Canine Urine Sediment.jpg|alt=Translucent, hexagon-shaped crystals seen through a microscope|thumb|Microscopic [[cystine]] crystals have a distinctive hexagonal shape and are present in the urine of people with kidney stones composed of cystine]]
People with certain rare [[Inborn error of metabolism|inborn errors of metabolism]] have a propensity to accumulate crystal-forming substances in their urine. For example, those with [[cystinuria]], [[cystinosis]], and [[Fanconi syndrome]] may form stones composed of [[cystine]]. Cystine stone formation can be treated with urine alkalinization and dietary protein restriction.  People affected by [[xanthinuria]] often produce stones composed of [[xanthine]]. People affected by [[adenine phosphoribosyltransferase deficiency]] may produce [[2,8-dihydroxyadenine]] stones,<ref name=Kamatani1996 /> [[Alkaptonuria|alkaptonurics]] produce [[homogentisic acid]] stones, and [[Iminoglycinuria|iminoglycinurics]] produce stones of [[glycine]], [[proline]], and [[hydroxyproline]].<ref name=Rosenberg1968 /><ref name=Coskun1993 /> Urolithiasis has also been noted to occur in the setting of therapeutic drug use, with crystals of drug forming within the renal tract in some people currently being treated with agents such as [[indinavir]],<ref name=Crixivan2010 /> [[sulfadiazine]],<ref name=Schlossberg2011 /> and [[triamterene]].<ref name=Carr1990 />