Rare diseases · Sign or symptom

Abnormal coagulation factor V activity

HP:0031899

What it means

Any deviation from the activity of coagulation factor V.

Factor V is activated to factor Va by means of minute amounts of thrombin (and inactivated by larger amounts of thrombin). Activated factor V (fVa) is a cofactor in the formation of the prothrombinase complex.

Part of the broader category

Also called: Abnormal factor V activity

Abnormal coagulation factor V activity

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This 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.