RT Journal Article SR Electronic T1 MOG Antibody–Associated Disease and Thymic Hyperplasia JF Neurology - Neuroimmunology Neuroinflammation JO Neurol Neuroimmunol Neuroinflamm FD Lippincott Williams & Wilkins SP e200077 DO 10.1212/NXI.0000000000200077 VO 10 IS 2 A1 Brigitte Hurtubise A1 Elliot M. Frohman A1 Steven Galetta A1 Laura J. Balcer A1 Teresa C. Frohman A1 Robert P. Lisak A1 Scott D. Newsome A1 Jennifer S. Graves A1 Scott S. Zamvil A1 Lilyana Amezcua YR 2023 UL http://nn.neurology.org/content/10/2/e200077.abstract AB Myelin oligodendrocyte glycoprotein antibody–associated disease (MOGAD) is a recently described CNS inflammatory disorder that may manifest with optic neuritis, myelitis, seizures, and/or acute disseminated encephalomyelitis. While MOG-specific antibodies in patients with MOGAD are IgG1, a T-cell–dependent antibody isotype, immunologic mechanisms of this disease are not fully understood. Thymic hyperplasia can be associated with certain autoimmune diseases. In this report we describe a case of MOGAD associated with thymic hyperplasia in a young adult.Ab=antibody; AQP4=aquaporin 4 antibody; CRION=chronic relapsing inflammatory ON; CRP=C-reactive protein; ED=emergency department; ESR=erythrocyte sedimentation rate; FLAIR=fluid-attenuated inversion recovery; IgG=immunoglobulin G; IV-MP=IV methylprednisolone; MOG=myelin oligodendrocyte glycoprotein; MOGAD=MOG antibody–associated disease; NMOSD=neuromyelitis optica spectrum disorders; NMO=neuromyelitis optica; ON=optic neuritis; TLH=thymic lymphocytic hyperplasia