A 40-year-old woman presented to her physician with complaints of intermittent flank pain. A urine sample was submitted for routine urinalysis. The patient's sample (left) was notable for a milky white appearance after centrifugation (Fig. 1; a normal urine sample is shown at right). The patient was born in India but moved to the US 10 years ago. She has a 5-year self-reported history of occasional cloudy urine with passage of small blood clots.
- What is responsible for the milky appearance of this urine sample?
- How can the cause of the milky appearance be identified?
- Does the cause of the milky appearance interfere with urinalysis?
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