Creutzfeldt -Jakob Disease Associated with E200K Mutation and SARS-Cov2 Infection, Pure Coincidence or Neurodegenerative Acceleration?

Several recent studies reported on some patients developing Creutzfeldt–Jakob disease (CJD) following coronavirus disease 2019, but, to the best of our knowledge, this case is the first reported in Italy on an onset of a CJD genetic form (gCJD) immediately after COVID-19 infection. We present a 51-year-old woman with a positive family history for CJD, who, two months after a mild SARS-CoV-2 infection, presented a rapidly progressing dementia diagnosed as CJD through clinical features, imaging, electroencephalography, and cerebrospinal fluid analysis. Genetic testing revealed the E200K mutation (p.Glu200Lys) c.598G>A, with homozygosity for methionine (MET) at codon 129, thus confirming the diagnosis of Creutzfeldt–Jakob disease. She passed away two months later. Interestingly, our case confirms that homozygous E200K gCJD patients are characterized by a relatively younger age of onset; moreover, it also sheds light on the neurodegeneration underlying both prion diseases and COVID-19 infection. In our opinion, the rising global prevalence of neurodegenerative complications following COVID-19 disease adds urgency to the study of this potential relationship, mostly in elderly patients who may experience worse long-lasting outcomes systemically and within the nervous system.