Final answer:
Crystalluria is indicative of abnormal metabolism of a substance and is associated with a risk of urolithiasis (kidney stones).
Step-by-step explanation:
Crystalluria is indicative of abnormal metabolism of a substance and is associated with a risk of urolithiasis (kidney stones). When certain substances in urine become highly concentrated, they can crystallize and form solid deposits that can attach to the walls of the kidneys, resulting in kidney stone formation. Examples of substances that can form kidney stones include calcium, oxalate, and uric acid.