Can a urine dysmorphic RBC test really tell if the blood in my urine is coming from my kidneys or the urethra? I had results showing 1012 cellshpf in my urine, but when I did the test again 4 days later, it dropped to 12 cellshpf. Does this mean it was a false reading, or could the sample have been off? I'm a bit confused about what to make of these results.

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Dr Ibrahim Salah

General Practitioner

MBBS
2+ Yrs

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Yes ideally Dysmorphic RBCs indicate renal problem,but in your case as it is an incidental finding for once and is not continuing you can ignore it,if you are woried visit Nephrologist for evaluation and appropriate management

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Answered 04/07/2025

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Understanding Dysmorphic RBCs in Urine
- Dysmorphic RBCs suggest kidney-origin bleeding, unlike uniform RBCs from the urethra.
Interpretation of Urine RBC Counts
- A high RBC count (e.g., 1012 cells/hpf) dropping to 12 cells/hpf may indicate transient bleeding, sample issues, or lab errors.
Reliability of the Test and Sample Collection
- Proper sample collection is crucial. Factors like hydration and handling can affect results.
Next Steps and Medical Advice
- Consider follow-up testing or consult a urologist/nephrologist. Additional tests like repeat urine microscopy or imaging may be needed.
Summary and Reassurance
- Fluctuations in results can occur. Further evaluation is key to understanding the cause and ensuring proper care.

Recommended next steps

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Answered 20/08/2025

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