Mutation in the Codon V180i in Familial Creutzfeldt-Jakob Disease with Diffuse Cortical Hyperintensity, in Brazil
Context: Familial Creutzfeldt-Jakob Disease (fCJD) represents 10 to 15% of CJD. Among its subtypes there is a mutation in codon V180I, in which, in complementary exams are observed an absence of specific findings in the electroencephalogram, low concentration of proteins in the CSF and a pattern of diffuse cortical hyperintensity (DCH) in the diffusion sequence identified by MRI. The fCJD with mutation in the V180I codon is predominant in females, presenting symptoms at an advanced age, slow progression, marked by important cognitive decline and low presence of myoclonus. Regarding therapeutic management, there is still no curative or modifying treatment, although the multidisciplinary approach plays a fundamental role in control and quality of life. Case report: A 72 years old male patient reported a history of recent progressive memory loss for three months. It evolved with difficulty in recognizing family members, repetitive behavior, global aphasia, instability when walking until reaching akinetic mutism. The diffusion sequence of MRI revealed areas of diffuse hyperintensity throughout the cerebral cortex. In view of this and after ruling out other etiologies, a mutation in the V180I codon related to fCJD was found. Conclusion: Given the rarity of this form of the disease, a rapid suspicion is essential, with imaging tests, especially skull MRI, and genetic tests, aiming at the proper diagnosis of CJD and its genetic form, with its correct therapeutic management.