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Unusual clinical presentations in patients with E200K familial Creutzfeldt-Jakob Disease (fCJD) have been rarely reported. Herein, we described a case of E200K fCJD presenting with subacute cranial multiple neuropathy, initially suspected to be paraneoplastic or due to a leptomeningeal carcinomatosis, considering the neoplastic comorbidity of the patient. Surprisingly, brain MRI was highly suggestive of CJD. Brain histological examination confirmed the diagnosis. Genetic tests led to the definite diagnosis of E200K fCJD. To the best of our knowledge, the current case provides the first report of a histologically-confirmed E200K fCJD starting with cranial multiple neuropathy and may widen the spectrum of the clinical variability of CJD, also in its genetic variant. Unusual presentations may lead, as in this case, to incorrect diagnostic hypothesis and unuseful therapeutic attempts in the first phase of the diagnostic process. Also in the genetic variant of CJD, brain MRI demonstrated a very high sensitivity to detect the typical abnormalities since the earliest phases of the disease.

E200k Familial Creutzfeldt-Jakob Disease Presenting with Subacute Multiple Cranial Neuropathy