A Case of Dengue Encephalitis with Double Doughnut Sign:

Lucky  Bhalla; Vineet  Sehgal; Priyanshu  Bansal; Shaifali  Arora

Lucky Bhalla Department of Paediatrics, Sehgals Neuro and Child Care Centre, Amritsar, Punjab, India https://orcid.org/0000-0002-9663-2330
Vineet Sehgal Department of Neurology, Amandeep Medicity, Amritsar, Punjab, India https://orcid.org/0000-0003-0817-696X
Priyanshu Bansal Department of Neurology, Sehgals Neuro and Child Care Centre, Amritsar, Punjab, India https://orcid.org/0000-0002-4827-6167
Shaifali Arora Department of Neurology, Sehgals Neuro and Child Care Centre, Amritsar, Punjab, India https://orcid.org/0000-0002-1925-1040

Keywords: Dengue, Encephalitis, Flavivirus, Mosquito borne encephalitis, Thalamus

Abstract

Dengue is the fastest-growing mosquito-borne infection in the world. Encephalitis is an uncommon neurological manifestation of Dengue Infection. A unique radiological finding of the double doughnut sign is associated with dengue encephalitis. The term ’double doughnut sign’ was coined to describe lesions of the thalamus on each side of the brain. MRIs in some patients with Japanese encephalitis and herpes encephalitis can also show this sign, prompting inclusion of these diseases in the differential diagnosis. However, further research is needed to determine whether this finding is the most critical predictor for diagnosing dengue encephalitis. Our goal is to shed light on a rare MRI finding of the double doughnut sign in a patient with dengue encephalitis through this case report.

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