Calcium channel antibody positivity

What it means

The presence of autoantibodies (immunoglobulins) in the serum that react against voltage-gated calcium channels.

This abnormality can be observed in patients with Lambert-Eaton syndrome and other paraneoplastic syndromes.

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: Ca channel antibody positivity · Ca2+ channel antibody positivity