Abstract: The genetic scope of diseases is getting wider every day. With the advancement of knowledge and the ever growing entanglement between different branches of science, the diagnosis of prion-caused diseases is becoming easy. However, the devastating outcome of these diseases such as the eventual death in the case of FFI is not. Rare as it may be, FFI is just as dangerous as any other disease; this is mainly due to its fatal outcome. FFI is an autosomal dominant prion disease; the mutation is in the protein gene (PRNP) D178N/129.According to our knowledge, no cases have been reported in Sudan. This may be explained by the misdiagnosis as the symptoms are shared by many neurological diseases.