It is important for the diagnosis of Lambert-Eaton myasthenic syndrome (LEMS) to confirm the incremental response at high-rate stimulation or after brief exercise in the repetitive nerve stimulation (RNS) test. Therefore, it may be difficult to diagnose LEMS if the RNS test is normal initially. We report a patient with LEMS whose diagnosis was delayed due to normal RNS findings. We believe that anti-P/Q-type voltage-gated calcium channel antibody testing is crucial in the diagnosis of LEMS.

No abstract available.
Myelitis* ; Spinal Cord Diseases*

No abstract available.
Neuromyelitis Optica

Coronavirus disease 2019 (COVID-19) is an infectious disease caused by severe acute respiratory syndrome coronavirus 2 that may trigger Guillain-Barre syndrome (GBS) in selected patients. We describe a case of GBS presenting as marked finger extensor weakness in a 73-year-old woman with COVID-19. Her clinical and electrophysiological findings were consistent with a diagnosis of acute motor axonal neuropathy subtype of GBS with prominent finger dropping. Treatment with intravenous immunoglobulin for 5 days completely resolved her finger extension weakness after 19 months, although other involved extremities recovered earlier at 3 months. This study highlights that COVID-19-associated GBS can present in various forms aside from the classic variant, even in patients without any COVID-19 symptoms. Therefore, it is important to always consider the diagnosis of GBS in patients with COVID-19.