Blood group antigen abnormality

What it means

An abnormality of an erythrocyte cell surface molecule.

During development, the human immune system recognizes antigens of the body as 'self' and does not generate antibodies against them.

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