Opercular myoclonic-anarthric status (OMASE) secondary to anti-Hu paraneoplastic neurological syndrome

Abstract

Focal Opercular Myoclonic – Anarthric Status Epilepticus (OMASE) is a rare form of focal motor status epilepticus caused by several etiologies. It is characterized by fluctuating dysarthria and epileptic myoclonus involving the bilateral glossopharyngeal musculature. We present the case of a 52-year-old woman who experienced gradual and progressive paralysis and myoclonus of facial and bulbar muscles; additional tests revealed the presence of right breast ductal adenocarcinoma and positive serum anti-Hu and anti-GAD65 antibodies. High doses of steroid pulses, anti-seizure therapy, and rituximab partially controlled myoclonus; the tumor resection improved dysphagia and dysarthria.

Keywords

• Paraneoplastic neurological syndrome
• Autoimmune encephalitis
• Status epilepticus
• OMASE
• Anti-Hu IgG