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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).
Hematuria can be classified according to visibility, anatomical origin, and timing of blood during urination. [1] [6]In terms of visibility, hematuria can be visible to the naked eye (termed "gross hematuria") and may appear red or brown (sometimes referred to as tea-colored), or it can be microscopic (i.e. not visible but detected with a microscope or laboratory test).
Microscopic hematuria is sometimes observed in healthy people after exercise [98] or as a consequence of contamination of the sample with menstrual blood. [97] Pathologic causes of hematuria are diverse and include trauma to the urinary tract, kidney stones , urinary tract infections , drug toxicity , genitourinary cancers, and a variety of ...
Rates of asymptomatic bacteriuria [5] Group Prevalence (in %) Healthy premenopausal women: 1.0 to 5.0 Pregnant women: 1.9 to 9.5 Postmenopausal women (50 to 70 years of age) 2.8 to 8.6 People with diabetes mellitus: Women: 9.0 to 27.0 Men: 0.7 to 1.0 Older community-dwelling people: Women (older than 70 years) > 15.0 Men: 3.6 to 19.0 Older long ...
Most patients with thin basement membrane disease are incidentally discovered to have microscopic hematuria on urinalysis. The blood pressure, kidney function, and the urinary protein excretion are usually normal. Mild proteinuria (less than 1.5 g/day) and hypertension are seen in a small minority of patients.
Hematuria (one of the symptoms of Nephritic syndrome. Historically, nephritic syndrome has been characterized by blood in the urine (), high blood pressure (hypertension), decreased urine output <400 ml/day (), red blood cell casts, pyuria, and mild to moderate proteinuria.
Rates of asymptomatic bacteria in the urine among men over 75 are between 7–10%. [11] 2–10% of pregnant women have asymptomatic bacteria in the urine and higher rates are reported in women who live in some underdeveloped countries. [108] Urinary tract infections may affect 10% of people during childhood. [7]
The findings on renal biopsy correlate with the severity of symptoms: those with asymptomatic hematuria may only have focal mesangial proliferation while those with proteinuria may have marked cellular proliferation or even crescent formation. The number of crescentic glomeruli is an important prognostic factor in determining whether the ...