genitourinary disorders
Isolated Hematuria
Introduction
 3 RBCs per high-power field on urine sediment examination. Urine may be red, bloody, or cola-colored (gross hematuria with oxidation of blood retained in the bladder) or not visibly discolored (microscopic hematuria). Isolated hematuria is urinary RBCs without other urine abnormalities (eg, Proteinuria , casts). Red urine is not always due to RBCs. Red or reddish brown discoloration may result from the following: Hemoglobin or myoglobin in urine Overview of Porphyrias (most types) Foods (eg, beets, rhubarb, sometimes food coloring) Drugs (most commonlyphenazopyridine, but sometimes cascara, diphenylhydantoin,methyldopa, phenacetin, phenindione, phenolphthalein, phenothiazine, andsenna) 