Microhematuria

Microhematuria, also called microscopic hematuria (both usually abbreviated as MH), is a medical condition in which urine contains small amounts of blood; the blood quantity is too low to change the color of the urine (otherwise, it is known as gross hematuria). While not dangerous in itself, it may be a symptom of kidney disease, such as IgA nephropathy or Sickle cell trait,^[1] which should be monitored by a doctor.

The American Urological Association (AUA) recommends a definition of microscopic hematuria as three or more red blood cells per high-power microscopic field in urinary sediment from two of three properly collected urinalysis specimens.^[2]

Microhematuria is usually asymptomatic, and as of 2001 there were medical guidelines on how to handle asymptomatic microhematuria (AMH) so as to avoid problems such as overtreatment or misdiagnosis.^[2] In 2020 American Urological Association guidelines were updated.^[3]

See also

• Proteinuria
• Hematuria
• Myoglobinuria
• Hemoglobinuria

References

1. "Sickle Cell trait and Hematuria: Information for healthcare providers" (PDF). cdc.gov. Center for Disease Control and Prevention. Retrieved 3 July 2020.
2. Grossfeld, G.; Wolf Jr, J.; Litwan, M.; Hricak, H.; Shuler, C.; Agerter, D.; Carroll, P. (March 15, 2001). "Asymptomatic microscopic hematuria in adults: Summary of the AUA best practice policy recommendations". American Family Physician. 63 (6): 1145–1154. PMID 11277551.
3. "Microhematuria: AUA/SUFU Guideline (2020) - American Urological Association". www.auanet.org. 2020. Retrieved 2023-03-11.

External links

• Cohen RA, Brown RS (2003). "Clinical practice. Microscopic hematuria". N. Engl. J. Med. 348 (23): 2330–8. doi:10.1056/NEJMcp012694. PMID 12788998.
• 2012 AUA Guidelines