MOG and myeloid sarcoma: The ONrecurrence rate in MOGAD is even higher than that in NMOSD (MOG vs NMOSD vs MS:annual relapse rate, 1.2% vs 0.6% vs 0.4%)(13), and the second attack occurs more quickly after theinitial attack in MOGAD (3.6 months) than in NMOSD (12.4 months) or MS (17months)(26).