Paraproteinemia-induced demyelinating peripheral neuropathy belongs to the group of autoimmune peripheral neuropathies, caused by autoimmune disorders in the body.

Autoimmune pancreatitis and immunoglobulin G4-related disease (IgG4-RD) are new disease entities characterized by enhanced IgG4 antibody responses. Serum IgG4 antibody concentrations are widely used as useful biomarkers for the diagnosis and monitoring of disease activity in autoimmune pancreatitis and IgG4-RD.