Bilirubin crystalluria

Bilburin may crystallize in urine by forming yellow red or reddish-brown needles or grains. Crystals of bilburin may be observed in high concentrated urine from clinical unsuspicious dogs. If they’re to be found in high number in serial urine samples, it’s assumed that there is a disorder of the bilirubin metabolism.


Microphotographic illustration of bilirubin crystals in urine sediments from an one year old male Miniature Schnauzer.