Materials and methods:All patients under 18 years old with positive ANCAS vascultiis that required TPE where included during the period of May 2010 and December 2013.Results: 13 patients where treated, with a total of 73 TPE sessions.The average age was 52,3 years (Range 17 to 70).The principal diagnosis for interventions was rapidly progressive glomerulonephritis (RPGN) plus alveolar hemorrhage (63%).The average number of sessions per patient was 5,6 (range 1 a 10) with an average of plasma volume exchange per session of 1,26 (range 0.72 a 1,56).Of the 13 patients, 11 (84,6%) required renal replacement therapy (RRT) during hospitalization.At discharge, 36.3% recover the renal function, 27% continue on RRT and 36,3% died.There was at least one complication in 6,8% of all sessions.Conclusions: TPE is an excellent tool to treat patients with positive ANCAS vasculitis that present with RPGN, high levels of serum creatinine or dialysis need, or alveolar hemorrhage.This is a safe procedure with comparable results according to International literature.