Pathophysiology

Any process that results in infection, inflammation, or injury to the kidneys, ureters, bladder, prostate, male genitalia, or urethra may result in hematuria ( Ta.,ble...9..3..:.1 and Iable.93-2). In false hematuria, the urine appears bloody, but dipstick test results are negative for blood, and there are no RBCs on microscopic evaluation ( Table, 93:3). Free hemoglobin, myoglobin, or porphyrins in the urine result in a positive urine test strip reaction for blood but no RBCs on microscopic evaluation.

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TABLE 93-1 Most Common Causes of Hematuria

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