[Status epilepticus in a pregnant patient with a previously unrecognized POLG-associated disease].

POLG -associated diseases are rare causes of pharmacoresistant epilepsy and status epilepticus, especially in adult patients. Phenotypic and genotypic variability in these conditions causes the complexity of their diagnosis. In the study, we report a case of a 33-year-old female patient who developed recurrent convulsive status epilepticus with focal clonic onset at the week 22/23 of pregnancy. Intensive anti-seizure therapy was administered, including the use of valproic acid, as well as the treatment of somatic complications. Given the acute onset, the semiology of seizures, the presence of psychopathological symptoms, autoimmune etiology of the disease was initially suspected. A month after the withdrawal of valproic acid, the patient began to show signs of toxic hepatitis, which eventually led to death. According to the results of whole-exome sequencing obtained later, the patient was a carrier of a pathogenic homozygous variant c.2243G>C (p.W748S) in the POLG gene. The presented case highlights the importance of molecular genetic testing and the risk associated with valproic acid hepatotoxicity in patients with cryptogenic epileptic status.