Urine Casts and crystals

• URINARY CRYSTALS
  

Crystals	Shape
Uric acid crystals	Envelope shaped
Uric acid dehydrate	Tear drop shaped  crystals in urine
Cystine crystals	Hexagonal plate shaped
Struvite crystals	Rectangular prisms
Hippurate crystals	Needle shaped crystals

• URINE CASTS
  

Casts	Disease
Hyaline casts	Normally present in urine
RBC casts	Glomerular injury
White cell casts	Interstitial nephritis / pyelonephritis
Broad granular casts	Chronic renal failure
Pigment muddy brown granular casts	Tubular necrosis