Pseudotumor Cerebri Complicating Multisystem Inflammatory Syndrome in a Child

Purpose: To report a case of pseudotumor cerebri (PTC) in a child associated with multisystem inflammatory syndrome in children (MIS-C), associated with presumed coronavirus disease 2019. Methods: A previously healthy 11-year-old female child presented with a 4-day history of fever, headache, vomiting, and loose stools. Laboratory investigations revealed neutrophilic leukocytosis, and markers of inflammation (C-reactive protein, ferritin, and interleukin-6) were significantly elevated. Pharyngeal swab for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) by polymerase chain reaction was negative while anti-SARS-CoV-2 antibody was highly reactive. Ophthalmic evaluation for transient visual obscurations during hospital course revealed swelling of the optic disc in both eyes. Spectral-domain optical coherence tomography and ultrasonography confirmed the ophthalmoscopic findings. There was no neurologic deficit. Magnetic resonance imaging of the brain and magnetic resonance venogram revealed no structural lesion. The opening pressure of cerebrospinal fluid (CSF) was 336 mm of water, and CSF composition was normal. Results: A diagnosis of PTC associated with MIS-C was made, and the child was treated with oral acetazolamide. Edema of the optic disc regressed following therapy, and the child is under follow-up. Conclusions: PTC can occur in association with MIS-C. Clinicians need to be aware of this potential neuro-ophthalmic complication in MIS-C. Prompt diagnosis and treatment can prevent visual loss.