Dengue virus encephalitis presenting as Artery of Percheron infarct: A case report

Dengue is a common viral infection and it occurs worldwide. It can present from a clinically silent infection to dengue fever, dengue hemorrhagic fever and fulminant dengue shock syndrome. Dengue viral infection can involve brain by either causing encephalopathy or encephalitis. Here we report case of a 40 years old female who presented with complaints of fever for two days followed by ptosis of left eye and altered levels of consciousness which were sudden in onset. MRI Brain was done which was showing hyperintensity in T2W/FLAIR and restricted diffusion on DW images in bilateral thalamus and midbrain. Serology came out to be positive for dengue IgM antibody. So on the basis of clinical history, MRI findings, positive serology and exclusion of other causes, diagnosis of dengue virus encephalitis was made. Keywords: Dengue Virus, Dengue Virus Encephalitis, Artery of Percheron, Infarct