Assay of serum ENA、ANA、anti-dsDNA on 89 patients with SLE

To accquire the accurate diagnosis of systemic lupus erythematosus (SLE) early, we performed tests of antinuclear antibody(ANA), antibody of extractable nuclear antigen(ENA) and antibody of double strand DNA (anti-dsDNA) in the serum on 89 patients with clinical diagnosis of SLE. The results are as follows:32.58% tested positive for anti-Sm antibody;87% tested positive for ANA;73% tested positive for anti dsDNA. The study suggested that the tests of ANA、ENA and anti-dsDNA should be performed simultane ously to avoid missing out the diagnosis of atypical or early stage SLE.