TPO and neuromyelitis optica: Antibodies to thyroid peroxidase (TPO), ANCA (antineutrophil cytoplasmic antibodies), double stranded deoxyribonucleic acid (dsDNA), ribosomal P, neuronal, N-methyl-D-aspartate receptor (NMDA), Smith, ribonucleoprotein (RNP), Beta 2 glycoprotein/cardiolipin, neuromyelitis optica (NMO)/aquaporin-4 (AQP4), and SSB were negative/WNL.