Hemoglobinuria

What it means

The presence of free hemoglobin in the urine.

If, following hemolysis, haptoglobins (hemoglobin-binding proteins) are saturated, then free hemoglobin appears in the urine.

Rare diseases that can present with this5

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Haemoglobin in urine