Urine Crystals

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Crystals found in the urine upon microscopic examinations

Crystals found in Acidic Urine Only

Uric Acid
Amorphous Urates
Cystine
Cholesterol
Bilirubin

Crystals found in Alkaline Urine Only

Triple Phosphate
Ammonium Biurate
Calcium Carbonate

Crystals found in Acid/Neutral Urine

Calcium Oxalate
Leucine
Tyrosine

Crystals found in Alkaline/Neutral Urine

Amorphous Phosphates

Uric Acid

yellowish-brown, rhombic plates, rosettes, wedges, and needles in acidic urine

Amorphous Urates

Brick dust/yellowish-brown granules, often in clumps
in acidic urine

Calcium Oxalate

colorless "envelopes" in acidic/neutral urine

Amorphous Phosphates

white colorless granules in alkaline/neutral urine

Triple Phosphate

colorless prisms resembling "coffin lids" in alkaline urine

Ammonium Biurate

Yellowish-brown spicule-covered spheres resembling "throny-apples" in alkaline urine

Calcium Carbonate

colorless dumbells or spheres in alkaline urine

Cystine

colorless hexagonal plates in acidic urine

Cholesterol

colorless rectangular plates with a notch in one or more corners in acidic urine

Leucine

Yellowish-brown spheres with concentric circles with radial striations in acidic/neutral urine

Bilirubin

Yellow clumped needles in acidic urine

Tyrosine

colorless/yellow fine needles in acidic/neutral urine

Amorphous Urates

Calcium Oxalate

Amorphous Phosphates

Triple Phosphate

Ammonium Biruate

Calcium Carbonate

Cholesterol

Abnormal Crystals in Urine

Cystine
Cholesterol
Leucine
Tyrosine
Bilirubin

Normal Crystals in Urine

Uric Acid
Amorphous Urates
Calcium Oxalate
Amorphous Phosphate
Triple Phosphate
Ammonium Biurate
Calcium Carbonate

Tyrosine & Leucine

seen in severe liver disease

Cystine

seen in cystinuria

Cholesterol

seen in Nephrotic Syndrome

Bilirubin

seen in liver disease

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