Objective\ To study the relationship between transforming growth factor β(TGF β), interleukin 6(IL 6) and myasthenia gr avis (MG).\ Methods\ The levels of TGF β and IL 6 in the culture media of b lood mononuclear cells induced by acetylcholine receptor (AchR) were measured wi th the external cell culture and enzyme linked immunosorbent assay (ELISA) in 34 MG patients and 20 normal controls. \ Results\ The levels of TGF β and IL 6 in the peripheral blood m ononuclear of MG patients were higher than...