Image from Prevent Cystine Stones Cystinuria is a rare genetic condition first discovered by William Hyde Wollaston in 1810, originally named “cystic oxide” (Eisner, 2020). An individual with cystinuria has an abnormally high concentration of the amino acid cystine in their urine, which crystallizes into a type of kidney stones, due to defective renal tubular absorption. Around 1 in 10,000 people worldwide have the condition and cystine stones make up only 1-2% of kidney st
