Rare diseases · Sign or symptom
Decreased level of heparin co-factor II
HP:0040226
What it means
An abnormality of coagulation related to a decreased concentration of heparin co-factor II
Requested and created by members of the BRIDGE consortium
Rare diseases that can present with this1
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: Heparin co-factor II deficiency
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.