Clinical and radiological manifestations of acute disseminated encephalomyelitis associated with the main arboviruses

Abstract

Introduction: Acute disseminated encephalomyelitis (ADEM) is an acute and inflammatory neuropathic disease that causes demyelination, predominantly affecting the white matter. Clinical manifestations of ADEM may be associated with the arboviruses zika fever, dengue fever, and chikungunya.

Objective: The aim of the present study was to carry out a bibliographical survey about the clinical manifestations and radiological findings of ADEM after infection with dengue, zika, and chikungunya viruses, as well as their correlation. 

Methods: MEDLINE, LILACS, Web of Science, and Scopus databases were searched for articles published between 2010 and 2020, written in English, Spanish, and Portuguese, about the occurrence of ADEM in patients affected by zika fever, dengue fever, or chikungunya. The search yielded articles that demonstrated the occurrence of five cases of ADEM associated with zika fever, ten cases post-infection with the dengue virus cases, and two cases related to chikungunya. 

Conclusions: The most common initial clinical presentations of ADEM were fever, nausea and/or vomiting, myalgia, headache, skin rashes, and arthralgia. The main neurological symptoms reported were changes in the level of consciousness, pyramidal signs, tonic-clonic seizures, visual changes, and urinary disorders. The most common radiological findings were T2/FLAIR hyperintense lesions on magnetic resonance imaging (MRI), affecting mainly the subcortical and central white matter. It is highlighted the importance of monitoring patients with dengue fever, zika fever, or chikungunya to identify clinical manifestations of ADEM that may contribute to an early and correct diagnosis of this encephalomyelitis, and, consequently, to intervene and obtain better patient prognosis.