Intact or not red blood cells secondary to bleeding in the urinary tract
Urinary tract infections are a common cause
In older individuals, malignancy must be ruled out
Clinical evidence for a neoplastic disease
History of renal trauma
History of blood transfusion
History of burns
Cause for renal infarction
Suggested Additional Lab Testing
For hemoglobinuria with urinary tract infection, complete blood count with white blood cell differential is useful. If hemoglobinuria might be explained by hemolytic anemia, a work-up for hemolysis, including a serum haptoglobin level, bilirubin, and lactate dehydrogenase, can be useful. Incompatibility of transfusion products with hemolysis is important to consider.
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