What autoimmune marker is associated with Churg-Strauss syndrome?

Churg-Strauss syndrome, now known as eosinophilic granulomatosis with polyangiitis (EGPA), is an autoimmune condition characterized by asthma, eosinophilia, and vasculitis affecting multiple organs. P-ANCA (perinuclear anti-neutrophil cytoplasmic antibodies) is the autoimmune marker commonly associated with this syndrome.

The presence of P-ANCA in patients indicates the activation of the immune system against the body's own neutrophils, contributing to the vasculitis and respiratory symptoms characteristic of Churg-Strauss syndrome. This correlation is particularly important in diagnosing the condition, as it helps differentiate it from other types of vasculitis.

Other autoimmune markers listed, such as anti-dsDNA, anti-centromere, and anti-Scl-70, are more closely tied to different autoimmune disorders, such as systemic lupus erythematosus or scleroderma, and do not have a significant association with Churg-Strauss syndrome. Hence, the identification of P-ANCA as the relevant marker is critical in the context of this syndrome.