Should the patient be tested for AQP4-IgG?, n (%)No, this patient does not have a core clinical characteristic of NMOSD.Yes, this patient had a history of a core clinical characteristic of NMOSD and she now has clinically and radiologically a short-transverse myelitis, which does not rule out NMOSD.This patient has a short-transverse myelitis on spinal MRI, which rules out NMOSD.No, this patient had a history of ON typical of MS and she now has clinically and radiologically a short-transverse myelitis, which rules out NMOSD.Not reported. Here, AQP4 is linked to myeloid sarcoma.