Diagnosis: Calcium Oxalate Crystals
• Crystals formed from the same substance can have various shapes.
• Abnormal crystals include cystine, tyrosine, leucine, and sulfadiazine.
• Uric acid crystals and cystine crystals can be hexagonal.
• Uric acid crystals, unlike some cystine crystals, are birefringent under polarized light.
• Crystal formation in urine is dependent on pH, temperature, and concentration of the substance.
