“…If symptoms persist despite GCS treatment, the relapse is defined as GCS-unresponsive and therapeutic plasma exchange (TPE) is recommended [ 7 , 9 , 10 , 13 ]. Meanwhile, TPE is implemented into therapeutic guidelines of a broad spectrum of neurological disorders [ 7 , 14 – 17 ]. The elimination of humoral factors (antibodies, complement factors, cytokines and immune complexes), all assumed to be involved in inflammation and demyelination in CIS and MS, is currently regarded as the rationale for TPE [ 7 , 18 , 19 ].…”