<prompt> Birefringent crystals in urine is seen withPhosphaturiaUricosuriaCystinuriaStruvite stones  <response>: Uricosuria refers to uric acid in the urine. Urine levels of uric acid can be described as: Hyperuricosuria, an abnormally high level of uric acid in the urine. Hypouricosuria, an abnormally low level of uric acid in the urine.briskeffervence crystals are seen in urine Ref Harrison20th edition pg 277 