Unusual neurologic manifestations occurring during dengue fever infection.

This is a report on dengue fever in two young patients in France that were infected in New Caledonia and Thailand. Both presented with unusual neurologic manifestations. The first patient developed a focal subarachnoid hemorrhage that was associated with transient thrombocytopenia. No neurologic vascular malformation was detected; a mild dengue hemorrhagic fever after a previous dengue infection was suspected. The second patient showed peripheral facial palsy one week after apyrexia without any other etiology except the dengue infection. This case was probably a postinfectious syndrome associated with dengue virus. Both patients recovered spontaneously. The circumstances of the neurologic manifestations in these patients may be attributed to the dengue fever virus. However, although neurologic complications reported for dengue fever are unusual, it is reasonable to consider these manifestations as being due to immunopathologic consequences.