We report on a patient with febrile illness, right unilateral paratracheal widening, pulmonary infiltrates, pleural effusions, exanthema and diarrhea. The right paratracheal widening was due to lymph node enlargement confirmed by CT scan. Symptoms disappeared subsequently without specific treatment. On the basis of serological tests, we are able to diagnose a coxsackie B3 virus infection. No previous case report of unilateral mediastinal nodal enlargement contemporary to a coxsackie B3 virus infection was found in our review of the literature.

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