Sensory Motor Neuropathy Complete Antibody PanelSerum
Performed by: Quest Diagnostics
Sensory-motor neuropathies may occur by various mechanisms. These include development of autoantibodies to neuronal structures such as myelin associated glycoprotein (MAG) antibody, Hu antibody, and the ganglioside antibodies.
Sensory-motor neuropathies may also occur via antibody cross-reactivity or local immune complex deposition as seen in autoimmune disease with primarily non-neuronal targets including Sjogren's syndrome (SSA/SSB), systemic lupus erythematosus and related conditions (ANA IFA), celiac disease (tTG antibody), vasculitis (ANCA), and immune complex deposition (cryoglobulins, rheumatoid factor). Motor-sensory neuropathy may be associated with monoclonal gammopathy (serum immunofixation and serum immunoglobulins).
Biomarkers included in this panel:
ANCA Screen includes evaluation for p-ANCA, c-ANCA and atypical p-ANCA. A positive ANCA screen reflexes to titer and pattern(s), e.g., cytoplasmic pattern (c-ANCA), perinuclear pattern (p-ANCA), or atypical p-ANCA pattern. c-ANCA and p-ANCA are obserLearn more
Cryoglobulins are circulating proteins, specifically immunoglobulins (i.e., IgG, IgM, IgA or light chains), that clump together (precipitate) when they are exposed to cold and dissolve when warmed. They may be present in small quantities in the bloodLearn more
Neuronal nuclear (Hu) antibody is present in patients with various neurological symptoms including two paraneoplastic syndromes: sensory neuropathy (PSN) and encephalomyelitis (PEM). The presence of Hu antibody strongly suggests underlying small cellLearn more
MAG, Western Blot with reflexes is useful in detecting antibodies associated with autoimmune peripheral neuropathy. MAG stands for Myelin Associated Glycoprotein.Learn more
Autoantibodies to myeloperoxidase (MPO) are commonly associated with the following small-vessel vasculitides: - microscopic polyangiitis, - polyarteritis nodosa, - Churg-Strauss syndrome, - necrotizing and crescentic glomerulonephritisLearn more
Autoantibodies to proteinase-3 (PR-3) are accepted as characteristic for granulomatosis with polyangiitis (GPA, Wegener's), and are detectable in 95% of the histologically proven cases. The cytoplasmic IFA pattern, (c-ANCA), is based largely on aLearn more
A tissue transglutaminase (tTG) IgA and/or IgG test is used as part of an evaluation for certain autoimmune conditions, most notably celiac disease. An autoimmune disease can occur when the body’s immune system mistakenly perceives a nonthreLearn more