Mi-2

The Mi-2 test checks for the presence of autoantibodies that target the Mi-2 nuclear antigen, a protein involved in gene regulation and muscle function. This test is used to help diagnose idiopathic inflammatory myopathies, such as Dermatomyositis (DM) and Polymyositis (PM), which are autoimmune diseases that cause muscle weakness and skin rashes. A positive result indicates the presence of Mi-2 antibodies, suggesting one of these conditions. A negative result means that the antibodies are not found, making these diseases less likely, but it doesn't completely rule them out. Additional tests may be needed for a more accurate diagnosis.