Rare diseases · Sign or symptom
Antiphospholipid antibody positivity
HP:0003613
What it means
The presence of circulating autoantibodies to phospholipids.
This group of autoantibodies comprises anticardiolipin, antiphosphatidylinositol, atiphosphatidylglycerol, and antiphosphatidylserine antibodies.
Rare diseases that can present with this14
Sometimes5–29%
8The 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: Antiphospholipid antibodies · Antiphospholipid antibody · Phospholipid antibody positivity
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
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.