Miller Fisher syndrome after COVID-19 vaccination: a case report

Case presentation: 17-year-old male patient, previously healthy. Twoweeks prior to symptoms reports immunization against COVID-19. Admitted presenting asthenia, limb paresthesia, ophthalmoparesis, diplopia, ataxia, decreased muscle strength with ascending progression, urinary and fecal incontinence, peripheral facial paralysis, dysphagia, dysphonia mental confusion. The neurological examination showed global areflexia, grade IV in upper limbs III lower limbs. During hospitalization evolved respiratory failure need for orotracheal intubation. Cranial MRI neuritis of the nerves spinal enhancement roots cauda equina. CSF cytological protein dissociation, suggestive Guillain-Barré Syndrome Variant Miller Fisher. He was treated intravenous human immunoglobulin 400 mg/kg/day 7 days partial improvement symptoms. needed a mature tracheostomy due difficulty extubation. After 23 days, he discharged rehabilitation hospital.