Microscopic Hematuria

Abstract

An otherwise healthy 48-year-old woman is found to have microscopic hematuria (5 red cells per high-power field) on a urinalysis performed by a life insurance company. No other laboratory abnormalities are identified; the serum creatinine concentration is 0.8 mg per deciliter (70.7 μmol per liter). The woman reports no symptoms and is a nonsmoker. Her blood pressure is 118/74 mm Hg, and the findings on physical examination are normal. How should she be evaluated?