Anti-LABD97 antibody positivity

What it means

The presence of autoantibodies (immunoglobulins) in the serum that react against LABD97, which is structurally identical to a portion of the extracellular domain of BPAg2. BPAg2, a 180 kDa bullous pemphigoid antigen, is a transmembrane protein important for basement membrane cohesion.

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