Peripheral blood lymphocytes from 30 patients with DM, 37 patients with other autoimmune diseases (15 cases of SLE, 15 cases of RA and 7 cases of pSS), and 23 healthy individuals were phenotypically analyzed by flow cytometry for their expression of CD19, CD24, and CD38 surface markers. Here, CD24 is linked to systemic lupus erythematosus.