Antinuclear antibody 1:100 positivity is not necessarily lupus erythematosus.
Antinuclear antibody belongs to autoantibodies, and 1:100 means that the patient has a positive titer of 1:100. Antinuclear antibody positivity is mainly seen in autoimmune diseases such as systemic lupus erythematosus, dry syndrome, mixed connective tissue disease, rheumatoid arthritis, dermatomyositis and so on, but in addition to this, some healthy people, patients with tumors, and patients with viral infections can also be found to be positive for antinuclear antibody.
Patients with positive antinuclear antibody 1:100 should be further tested for other autoantibodies, blood sedimentation, C-reactive protein, complement, immunoglobulin and other tests, as well as for rashes, mouth ulcers, arthralgias, alopecia, photosensitivity and other clinical manifestations.
It is recommended that patients with 1:100 positive antinuclear antibody go to the Department of Rheumatology and Immunology of regular hospitals for diagnosis and treatment under the guidance of doctors.