“…IgG inhibitors in sera against erythroid colony growth in vitro [24] against erythropoie tin [25] and IgG cytotoxic for erythroblasts [10] have been described. It is not surprising, therefore, that antithymo cyte globulin, immunosuppressive cytotoxic drugs, and corticosteroids have been employed both in TEC and PRCA [6,9,10,22,[24][25][26], Treatment may be of little or no benefit in TEC, since recovery usually occurs promptly [26]. However, recovery may be delayed for up to several months [22], In PRCA, however, the course is generally protracted, although a re sponse to corticosteroids and/or immunosuppressive drugs may occur [2,9].…”